Abu Dhabi, United Arab Emirates. STANDARD CONSTRUCTION SPECIFICATIONS (PART 1 - ROADS, Second Edition 2020)

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Subcontractor shall perform all required performance and reliability tests, as specified in Article
9.6.3.1.

9.5.3.7

Other Subsystem Configurations

Descriptions and detailed Specifications that are included in the Contract Documents are intended
to be as definitive as possible.  However, they are not meant to preclude other possible subsystem
configurations.    Subcontractors  who  have  well-developed  hardware  or  software  subsystems  that
differ from those described or specified shall submit with their Tender all details and particulars of
their subsystems. Consideration will be given to alternative configurations, provided that they show
major  advantages  without  a  sacrifice  in  performance,  compatibility  with  the  existing  traffic  control
system, maintainability or reliability.  However, after the execution of the Contract, no substitution
shall be made unless approved in advance by the Engineer in writing.

9.5.3.8

Installation of Pedestrian Signal Heads

Under this Contract the Subcontractor shall furnish and install all pedestrian signal heads, control
mechanisms and cables within sidewalk pylons or on poles as provided and installed for the
respective intersection, interchange or roadway construction as directed by the Engineer.

To ensure correct positioning of the equipment installed under this Contract, the Subcontractor shall
be responsible for coordination with the work executed under separate contracts in accordance with
the requirements of respective Clauses under Department of Transport Conditions of Contract and
Further Requirements in the Contract Documents.

9.5.3.9

Installation of Controller Communication Cables

All cable shall be installed, spliced, connected to terminal strips, tested and connected to the proper
equipment to produce a complete and operating traffic control system. Cables shall be pulled
through the conduit with a cable grip designed to provide a firm hold on the exterior covering of the
cable. All cable shall be pulled with a minimum of dragging on the ground or pavement.

Cable feeders shall be used. Powered soapstone, talc or other approved lubricants shall be used to
facilitate the pulling of the cable through the conduit.

Cable  ends  shall  be  taped  to  exclude  moisture  until  the  connections  are  made  or  the  terminals
attached.  Cable shield shall be connected to terminals to provide electrical continuity.  Cables shall
enter junction boxes through the bottom only.  Drop loops shall be provided in cables.

9.5.3.10

Installation of Electrical Components and Accessories

Installation of all electrical equipment for the traffic control system shall meet the requirements as
specified in this section as well as the applicable sections and clauses of Chapter 10, Lighting and
Electrical Distribution Works.

9.6

Intelligent Transportation Systems

9.6.1

Description

This Specification covers descriptions and requirements of the components and materials forming
part  of  the  intelligent  transportation  systems.  All  components,  items,  systems  and  sub-systems
supplied  and/or  implemented  under  this  Contract  shall  strictly  comply  with  requirements  and
specifications  stipulated  in  this  Specification  and  the  Abu  Dhabi

Traffic Signals and Electronic

Warning and Information Manual

. System shall be compatible, and capable of integration with any

existing system, and operate in harmony with the existing system.

All  non-civil  works  required  under  this  section  shall  be  executed  by  an  Owner  pre-approved
Subcontractor (from herein referred to as Subcontractor).  Subcontractor shall be a well established
ITS contractor and shall have carried out a number of works of similar nature and magnitude as this
Contract.  Subcontractor shall have previous experience in the hardware, software, principles and

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operational aspects of ITS, and shall be technically capable of integrating the ITS equipment installed
under this Contract with a new or existing central system, such that full compatibility is ensured.

Subcontractor shall have the necessary experience and resources to furnish, install, operate and
maintain all components of the intelligent transportation system such as equipment, cabinets, poles,
gantries, power supply panels, video and data communications system, cabling and wiring, and all
other components as may be specified herein, shown on the Contract plans or required in the
Particular Specifications.

Unit rates entered in the Bill of Quantities must include for all work as specified plus all on costs for
the main Contractor's work, attendance, overhead and profit. Any other items necessary for the
satisfactory completion of the works but not specifically mentioned in the Contract Documents will
be considered as subsidiary obligations to this Contract.

Main Contractor will be held responsible for the overseeing of the Subcontractors work, including the
scheduling, submittals, procurement and the ultimate acceptance of the ITS works so that all works
are completed by the Contract completion date.

9.6.1.1

General System Overview

Intelligent  transportation  systems  (ITS)  provides  monitoring,  detection,  verification,  traveller
information and response for traffic and transport related incidents, events, and accidents  as may
be existing or proposed new in and adjacent to the Project area by utilizing the latest technology,
hardware and software, and up-to-date traffic engineering principles and procedures.

ITS provided under this Contract shall be fully compatible with any existing ITS system deployed by
the Owner at the time of project initiation, or planned system expected to be deployed at project
completion at the discretion of the Owner. ITS central system and subsystems deployed in this
Contract shall comply with the requirements of the Abu Dhabi

Traffic Signals and Electronic Warning

and Information Manual

9.6.2

Materials

9.6.2.1

General

Materials of all parts used in the ITS shall be new and the best of their respective kind and the most
suitable for working under the weather and site conditions set out in these Specifications, thus
withstanding the variations of temperatures and other prevailing conditions without distortion or
deterioration of any part of the ITS.

Equipment included in these Specifications shall be so manufactured as to facilitate easy and proper
erection and maintenance. Design of all equipment shall ensure satisfactory operation under the
weather and site conditions mentioned.

In general, dissimilar metals in contact shall be avoided. When, however, they have to be used, the
contact points of dissimilar metals shall be adequately protected against galvanic corrosion.

It  is  the  intent  of  this  Specifications  that  the  Subcontractor  shall  be  the  supplier  and  installer  (or
manufacturer  and  installer)  of  the  main  items  of  the  ITS  meeting  the  requirements  of  the
Specifications and Contract plans.  Subcontractor shall submit for review and approval a complete
list of equipment, and the associated model numbers and materials that are proposed for use.  The
list shall include descriptive literature, technical details and drawings sufficient to fully describe and
explain the specified components of the intelligent transportation system and its integration with the
existing traffic control system, if required, and the existing or new central system as approved by the
Engineer and the Owner.  Where specified herein or when required by the Engineer, samples of any
of the materials and equipment proposed for use shall be submitted for review and approval.

It shall be the responsibility of the Subcontractor to ensure that all items supplied for use in this
project comply with the Specifications and approval of the Engineer. Subcontractor shall not procure
any equipment until the material submittal and applicable shop drawing has been approved by the
Engineer.

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This Specification governs the procedures for documentation and approval of all materials and
equipment proposed for use in this Contract. All materials shall comply with the requirements of the

Department of Transport ITS Design Manual

, Abu Dhabi

Traffic Signals and Electronic Warning and

Information Manual

as directed by the Engineer.

Subcontractor shall be responsible for the availability of the ITS equipment and to ensure that all
equipment shall be in strict adherence to the Standard Specification, Particular Specifications,
Contract plans, and approved shop drawings.

All costs of work and materials required for satisfying these specifications shall be included in the
Bill of Quantities under which the ITS works and material equipment shall be paid, and no additional
compensation will be allowed for the Subcontractor for any incidental costs that may occur in fulfilling
the requirements of the Contract Documents.

9.6.2.2

Submittals

All of the submittals in this section must be submitted as soon as possible after the award of Contract
and before any work is performed. Subcontractor shall submit the following for approval by the
Engineer:

1. System and equipment design: Contractor shall be responsible for final system and

equipment design. In accordance with the Project schedule, the Subcontractor shall produce
a system design document (SDD) within 90 days from Project commencement date, which
details  the  hardware  and  software  configuration  of  all  equipment  items,  provide  interface
control  details,  and  documents  compliance  with  the  detailed  system  requirements  as
provided  in  these  Specifications,  as  shown  on  the  Contract  plans  and  required  in  the
Particular  Specifications.  SDD  should  include  presentation  of  all  supplied  systems
requirements,  and  comply  with  the  following  requirements:  Subcontractor  shall  supply  a
complete list of the make and model of all equipment detailed in the SDD.  All the equipment
types that cannot be specified at the completion of the SDD, shall be listed and submitted
with the SDD. If more than one type is to be considered, all proposed types shall be submitted
with their evaluation criteria and compliance to the Specifications.

2. SDD shall contain the concept of operation, the communications scheme, and the major

features of the proposed systems in comparison to the Specifications. Subcontractor shall
not proceed with work until this document has been approved by the Engineer. Following the
Owners review of the SDD the Subcontractor shall conduct a presentation of the SDD within
45 days of the Owners review or as required by the Engineer. Presentation shall be held at
the Owners premises at time and location as directed by the Engineer, and conducted by the
senior  engineering  personnel  responsible  for  its  preparation  of  the  SDD.  Purpose  of  this
review will be to permit the Owner and the Engineer to assess conformance of design details
with the Specifications, in order that any deviations can be detected and corrected. SDD will
form  the  basis  on  which  detailed  work  can  proceed.  Subcontractor  shall  not,  without  the
specific approval in writing by the Engineer, submit materials or shop drawings for approval,
place any material or equipment on order, commence manufacture of any items of plant, nor
develop software until the Engineer has approved the SDD.   SDD shall serve as the basis
for the system development.

3. SDD shall be accompanied by appropriate system hardware and software documentation,

including  integrated  user  manuals,  laptop  screen  shots,  and  a  final  Interface  control
document defining the data structure, meta data, latency, relevant object definition remote
process  calls,  and  performance  characteristics  associated  with  each  of  the  systems.
Subcontractor  shall  include  a  matrix  with  references  demonstrating  compliance  with  the
Specifications; and any deviations shall be explicitly noted.

Engineer’s approval of the SDD

and any directions to revise the SDD will be submitted to the Subcontractor in writing. Any
oral directions received by the SDD will not be considered valid.

4. Should the Subcontractor wish to modify the approved SDD, he shall submit the changes or

additions to the Engineer for approval. Subcontractor shall not implement any changes or
additions until approval has been received. SDD shall be updated regularly to reflect changes
agreed with the Engineer, as the project proceeds.

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5. Integration staging plan: Subcontractors proposed integration staging plan shall be

submitted at the same time as SDD and it shall contain a detailed listing of the order and
schedule for the installation and the testing of outstation and in station equipment. Staging
plan shall clearly show the Subc

ontractor’s proposed order of field site installation and site

acceptance testing and shall show when the central control equipment of the system is to be
installed and tested and made operational.

9.6.2.3

Video Surveillance System (VSS)

a. Digital Video Management System (DVMS)

If a DVMS is required for the Contract, the Subcontractor shall supply, install, configure, and test the
DVMS, including the head-end server that is compatible with any systems currently implemented by
the Owner in the traffic control centre. On completion of the installation and connection of new
cameras, and taking into account all existing and planned cameras, the DVMS shall have 25 % spare
capacity for additional cameras. DVMS shall comply with the requirements of the Abu Dhabi

Traffic

Signals and Electronic Warning and Information Manual

The DVMS shall provide video surveillance management, video distribution within the Traffic Control
Centre/Control Room, to the video walls and workstations, and to external stakeholders as directed
by the Engineer and approved by the Owner.

The DVMS shall manage the storage, retrieval, and provide for processing of the video. The DVMS
shall be an IP network based, open platform, fully distributed digital video system which shall
integrate different brands of cameras as directed by the Engineer. The DVMS shall utilize local area
networks (LAN) as a transmission medium for video, configuration, as well as storage of all data.
The DVMS shall provide full video control of all connected cameras and shall be able to interface
with the existing DVMS at the existing control room locations, with additional full selection capability
at any point within the network from a workstation or a video wall display.

b. Digital Video Storage System (DVSS)

If a DVSS is required for the Contract, the Subcontractor shall supply, install, configure, and test a
DVSS, including server, that is compatible with any systems currently implemented by the Owner in
the traffic control centre. DVSS shall be integrated with the video surveillance system to record and
store video streams via an Ethernet network. DVSS shall comply with the requirements of the Abu
Dhabi

Traffic Signals and Electronic Warning and Information Manual

DVSS shall be compatible with the proposed DVMS and all other video surveillance system and
video analytics system hardware and software.

DVSS shall be configured to record video from the DVMS channels at 25 frames per second per
video, at 4CIF and megapixel resolutions using MPEG4 and H.264 compression for a minimum of
90 continuous days and archiving for the triggered events for one year. Compression factor shall not
exceed 30 % and shall not compromise the video quality in any way. Storage system shall be sized
based on the expected video stream bandwidth for H.264 video, at full resolution (D1) and full frame
rate (25 fps) of a scene with high level of change (roadway).

c. Network PTZ Camera Assembly

Network camera shall be a domed, compact, day/night within a rugged enclosure unless
otherwise authorized by the Engineer. All circuits shall be totally solid state with silicon
transistors and integrated circuits. All modules shall be plug-in type. Part adjustments, and
test point circuit symbols shall be silk-screened on the circuit boards for easy identification.
Markings shall be in English and Arabic language. Back box of the camera unit shall have
built-in memory to store camera and location specific dome settings, including labels, presets,
patterns, and zones. These settings shall be automatically downloaded when a new dome
drive is installed.

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Camera shall have a built-in 100 Base-TX network interface for live video streaming to any network
application as approved by the Engineer. Cameras shall be equipped with SFP port. Type of each
camera port/communication module (100TX or 100 FX) shall be chosen as per the site condition,
camera position and as directed by the Engineer to reduce the requirement for the media converters.
The communication modules shall be considered as a part of the camera. Dome system shall also
feature open architecture connectivity for third-party software recording solutions allowing integration
into any IP-based system, and allowing the system to record, manage, configure, and view multiple
live streams. Network camera shall automatically adjust for optimized image quality and bandwidth
efficiency  and  shall  allow  viewing  and  control  of  network  IP  video  by  users  with  the  appropriate
permissions. Network dome camera shall consist of a black box, a dome drive, and a lower dome.
Dome  drive  shall  feature  low  light  technology  allowing  the  camera  to  operate  in  scenes  where
minimal light is present. Camera shall automatically compensate for scenes where large contrasts
in  lighting  are  present.  Electronic  image  stabilization  shall  digitally  reduce  blurring  of  the  camera
images due to vibration.

Video shall comply with the following requirements:

Digital compression: MJPEG, H.264 (MPEG-4 Part 10)

Video streams: 3, simultaneous

Video resolutions:

PAL

ii.

4CIF

iii.

2CIF

iv.

CIF

Frame rate

H.264 at least 25 fps per port

ii.

MJPEG at least 25 fps per port.

Web user interface: HTTP

Progressive scan

Wide dynamic range

Supported protocols: IPv4/v6, HTTP, QoS, FTP, SMTP, UPnP, TCP, UDP, IGMP, RTP,

ICMP, DHCP, ARP, unicast IGMP, multicast IGMP, DNS, NTP

Electronic image stabilization

Dome drive features shall comply with the following:

Image enhancement

On-screen compass, tilt, and zoom display

Password protection

Rotating discreet liner with sealed fixed bubble

Masking zones (programmable in size) shall be able to be labelled.

Proportional pan/tilt: Continually decreases pan/tilt speeds in proportion to depth of zoom

Variable scan speed: Scan speed shall be programmable from 1-40°/sec or greater

“Auto flip” shall rotate dome 180° at bottom of tilt travel

Programmable zoom speeds

10.

Freeze frame during presets

11.

Full 360 degrees continuous camera rotation with auto flip features.

12.

Minimum of 99 preset positions.

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13.

Equipped with heater/blower

14.

Sensitivity of less than 0.01 lux for 30 IRE (B/W) and less than 0.1 lux for 30 IRE (colour).

15.

White balance of at least 10,000 K for MJPEG and H.264.

16.

Automatic video focus.

17.

Minimum 35 x optical, 12 x electronic zoom.

18.

Video buffer of at least 36 MB (pre-and post alarm)

19.

Electronic image stabilization

20.

Freeze frame during presets

21.

4 alarm inputs, and 4 outputs.

22.

Internal scheduling clock

Mechanical (dome drive only) shall comply with the following:

Pan movement 360° continuous pan rotation

Manual pan/tilt speeds

Pan 0.1° to 80°/sec or greater under manual operation,

ii.

150°/sec turbo tilt 0.1° to 40°/sec or greater under manual operation

Automatic preset speeds

Pan 400°/sec or greater

ii.

Tilt 200°/sec or greater

Electrical shall comply with the followings:

Input voltage: 18 to 30 VAC; 24 VAC nominal.

Input power: less than 100 Watts, Fuse 4.5 A at rated voltage

Power supply: 220 VAC fused with 1.5 A fuse (shall comply with reliability requirements)

Reliability requirements shall meet the following:

Environmental design requirements: Equipment shall meet all of its specified requirements

during and after subjecting it to any combination of the following requirements:

Mean time between Failures (MTBF) shall not be less than 100,000 hours.

ii.

Ambient temperature range of -10

to 60

iii.

Relative humidity from 0 % to 95 % non-condensing.

Camera control software shall comply with the following:

1. Pan and tilt system shall include a preset position controller which, upon reception of control

signals from the control centre, shall automatically preset pan/tilt position, zoom and focus of
the lens. A minimum of 99 preset positions shall be provided for each camera. In addition,
each preset shall have its own title of up to 20 alphanumeric characters.

2. Each camera shall be capable of responding to pre-programmed tours of multiple sequential

presets. Events that may be programmed as steps in a tour include preset positions, alarm
acknowledgment, alarm or preset dwell periods, auxiliary activation, repeating the tour or
calling up another tour (chaining tours).

3. Pan and tilt controller shall be operable from the surveillance workstations' graphical user

interface and/or a joystick keypad at the control centre. Acceleration of camera motion shall
be proportional to joystick displacement from a central software-defined dead zone.

Video delay: Video delay from the camera imager in the field to the operator monitor in the operations
room shall not exceed 150 ms. Control loop delay from the original camera image to a control action
by an operator to the time the image changes as a result shall not exceed 300 ms.

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Mediation of video permissions: All video images shall be titled with the organization, ID and priority
level of the operator observing the image. Other operators requesting control of the camera from the
operator with current control privileges shall have their priority compared to that of the current
operator. Control shall be automatically assigned to the operator with highest priority, and that
operator's organization and priority level will then be titled on the video image. Priorities within an
organization shall be event dependent to avoid inappropriate assignments. Organizations shall be
the Owner and other agencies as may be directed by the Engineer.

Panning, tilting, zooming and iris control shall be smooth and rapid, whether automatic or manual.
Focus shall be automatic. Colour camera shall be sensitive to low levels of illumination and shall
have many presets to which it can return with high accuracy. Camera assembly shall include a
camera controller and a communications interface. Dome enclosure shall be weatherproof to keep
out moisture and dust.

Zoom lens: Each VSS field subsystem camera shall be equipped with a remotely controlled, variable
focus, motorized zoom lens. The iris shall have an automatic control. The lens shall have a flat field
with high resolution. An adjustable lens adapter ring shall be used to provide focus tracking.

Environmental housing: Housing shall be aesthetic to view, compact, vandal-proof, rugged and
environmentally resistant. It shall be moisture, salt, sand and dust proof and suitable for operation in
a hot and humid atmosphere. It shall be manufactured of polymer technology for rigidity and long
service life. Housing shall have weather-resistant cable connectors as required for video, power and
remote controls. Housings shall consist of a double upper shell and a double lower viewing dome.
Housing shall be equipped with a heater and a blower that are controlled by a thermostat to maintain
an optimum environment within the housing. Housing shall comply with IP-66 standards.

d. Camera Coaxial Cable

All outdoor coaxial cables shall be of 75-ohm RG-6/U type. Centre conductor shall be an 18 AWG
100 % solid bare copper (BC) conductor. Shield shall be 100 % tinned copper, braided, and shall
provide 95 % efficiency, minimum. Outer jacket shall be black PVC. Cable shall have maximum 2.4
dB per 100 m attenuation at 10 MHz. Nominal capacitance shall be 53 pf per m. Nominal velocity of
propagation shall be 82 %., Nominal impedance shall be 75 ohms. Coaxial cable shall be terminated
with 75-ohm BNC nickel-plated connectors with 50 microns gold plated centre contacts.

All indoor video termination applications shall use a subminiature RG-59/U type, having 1 coax, 25
AWG, stranded (19x37) BC - bare copper conductors, foam PE-gas injected foam polyethylene
insulation, aluminium foil-polyester tape-aluminium foil (Duofoil) shield with 100 % shield coverage
plus tinned copper braid shield with 95 % shield coverage. Nominal capacitance shall be 16.3 pf per
300 mm, the nominal velocity of propagation shall be 83 %, and the nominal impedance shall be 75
ohms.

e. Camera Control Cable

If used in this Contract, all control cables shall be 2-pair, STP, tinned stranded copper conductors
with aluminium/polyester shield, 100 % coverage and S-R PVC jacket.

1. Hybrid Cable

Proposed hybrid cable by the Subcontractor shall meet most of the Specifications of the video coaxial
cable, control cable and power cable, as approved by the Engineer. This cable shall be capable to
transmit the control and video signals and also to feed the camera with power at the same time using
the same hybrid cable. Proposed cable shall be sufficient for outdoor use and shall be provided by
a recognized manufacturer in cabling industry. Outer jacket shall be black PVC. Cables shall comply
with the following specifications and requirements:

Video cable shall be 75-ohm RG-6/U type and as follows:

a)  Conductor: Single bare copper
b)  Conductor diameter: 1.02 mm
c)  Insulation dia (±0.15 mm): 4.6 mm

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d)  Shield: Al-Pet- Al shield > 125 %
e)  Braiding layer: Tinned copper
f)  Braiding coverage: 95 %
g)  Outer jacket: LSZH
h)  Jacket colour: Black
i)  Jacket diameter (± 0.20 mm):6.6 mm

ii.

Power cable will be 3 core @ AWG 18 and as follows:

a)  Conductor: 3X bare copper
b)  Conductor diameter:1.22 mm
c)  Insulation dia (±0.10 mm):1.6 x 3C twist
d)  Voltage rating 300V
e)  Voltage drop for 20 m @ 24 V dc: 0.61 V dc
f)  Outer jacket: LSZH
g)  Jacket colour: Grey
h)  Jacket diameter (± 0.15 mm):4.1 mm

iii.

Control cable will be twisted pair STP and as follows:

a)  Conductor: Stranded tinned copper
b)  Conductor size: AWG 22
c)  Conductor diameter: 0.77 mm
d)  Insulation dia: (±0.01 mm)1.2 x 2C  twist
e)  Shield: Al-Pet-Al shield ( on each pair) > 115%
f)  Outer jacket: LSZH
g)  Jacket diameter: 3.8 mm
h)  Jacket colour: Grey

iv.

Characteristics as follows:

a) 6+PE
b) Current carrying capacity: 13 A at 55

c) Operating temperature -40

C, +125

d) Gold plated contacts

9.6.2.4

Vehicle Detection System

Subcontractor shall furnish, install, integrate, configure, and test a vehicle detection system (VDS),
including the head-end server, for the purpose of obtaining traffic data and possible use in other
subsystems. VDS shall comply with the requirements of the Abu Dhabi

Traffic Signals and Electronic

Warning and Information Manual

a. Microwave / Radar Vehicle Detector

Owner prefers a road vehicle detector system (RVDS) that is a non-loop based and non-intrusive
such as radar and video, but will consider alternate vehicle detection solutions, provided that the
achieved accuracy meets the requirements of the RVDS specified herein, and the Abu Dhabi

Traffic

Signals and Electronic Warning and Information Manual

When required in the Contract Documents, the Subcontractor shall supply and install a RVDS for
the purpose of obtaining traffic data and possible use in other subsystems. RVDS shall comply with
the requirements of the Abu Dhabi

Traffic Signals and Electronic Warning and Information Manual

b. Field Equipment

Subcontractor shall furnish, install, integrate, configure, and test vehicle detection equipment in
accordance with the following:

1. Capabilities: System shall provide counts, speeds, occupancy, queue and classification data

at per-lane and aggregate basis. Candidate technologies are:

Inductive loop detectors (least preferred).

ii.

Video vehicle detection.

iii.

Radar vehicle detection.

iv.

Laser vehicle detection.

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Any other Owner or Engineer approved method

2. Accuracy requirements. Following accuracy criteria shall apply:

Self-calibration (count and occupancy). The system shall be able to achieve 85 % or
higher accuracy for vehicle counts and lane occupancy for each lane.

ii.

Manual calibration (count and occupancy). System shall be able to achieve via
manual tuning accuracy of 95 % or more for count and occupancy on a per-lane basis
when measured against ground truth.

iii.

Speed. System shall be able to achieve 90 % or higher speed measurement accuracy
when compared to ground truth.

All field equipment shall utilize IP network for communication to the traffic management centre or
local control room as approved by the Engineer.

All RVDS equipment shall be installed on poles along the roadway, embedded in pavement or on
attached to the sign gantries. Use of multi-purpose poles is encouraged to reduce the total number
of poles/structures; however such use is acceptable only if it does not in any way compromise the
operation of the collocated systems. If a separate structure is used it shall be suitable for the size of
the provided equipment and shall be capable of supporting all required equipment plus 50 %
increase in equipment weight with an appropriate safety factor.

c. Vehicle Detector Pole and Foundation

Pole foundations shall be consistent with the manufacturing requirements, and shall comply with
theses Specifications and the Contract plans. RVDS detectors shall be mounted on poles or other
structures  of  sufficient  height  and  of  construction  similar  to  that  Specified  elsewhere  for  video
surveillance  camera  poles.  Mounting  systems  provided  by  the  system  manufacturer  shall  be
preferred.

9.6.2.5

Traveller Information System (TIS)

Subcontractor shall furnish, install, integrate, configure, and test a TIS, including the head-end
server, as indicated on the Contract plans, specified herein, and in accordance with the requirements
of the Abu Dhabi

Traffic Signals and Electronic Warning and Information Manual

, as approved by

the Engineer. TIS includes dynamic message signs, directional electronic devices including lane and
speed control signs, and the subset of variable message signs mounted on the gantry, pole, and
other similar structures for queue warning, travel time purposes etc. Signs shall comply with the
applicable requirements of BS EN 12966.

a. Field Equipment

General requirements shall be as follows:

1. All dynamic message signs (DMS) shall be full-colour graphic matrix type, regardless of their

intended use. Minimum dimensions for the DMS signs shall be as follows:

Full Size DMS signs shall have minimum dimensions of 6000 x 2000 mm (Type A2)
for major roadways and 9000 x 3000 mm (Type A1) for major roadways with more
than four lanes of transportation. Full DMS signs shall have minimum dimensions of
4000 x 2000 mm (Type A4) for all secondary roadways. For all locations where the
transportation envelope may be restricted the minimum dimensions of the signs shall
be 6000 x 900 mm or 9000 x 900 mm if there are four or more lanes of Transportation.

ii.

Full size DMS signs shall provide critical information to drivers in English and Arabic
and shall be able to contain graphic symbols. Minimum size of displayed characters
shall be sufficient to allow the characters to be easily discernable (5 minutes of arc)
from a distance of at least 300 m by an operator having the lowest visual acuity which
allows the operator to legally operate a vehicle in the area.

2. Travel time (TT) signs shall be used to display point-to-point travel time information. These

signs shall be mounted on the side of the roadway. These signs may be either fixed signs
with a full colour graphic matrix DMS insert or full colour graphic matrix DMS signs as
approved by the Engineer and approved by the Owner. Minimum size of TT Signs shall be

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4000 x 2000 mm. The same character size rules applicable to the full DMS signs shall apply.
All locations shall have one (1) travel time sign on each side of the carriageway.

3. Queue warning /travel time DMS (Type A3) shall be used to provide point-to-point travel

information and other travel related information on the lane control and speed control sign
gantries (such as queue information). Signs are overhead mounted and shall be full colour
graphic matrix signs. The minimum size of these signs shall be 2000 x 2000 mm. The same
character size rules applicable to the full DMS shall apply.

4. Lane control and speed control signs (LCSCS) shall be used to provide lane and speed

control. All LCSCS shall be full colour graphic matrix signs with ability to display required
graphic images. LCSCS may be single signs (preferred) or two separate signs (one lane
control sign and one speed control sign). Minimum dimensions for LCSCS signs shall be 900
x 900 mm.

5. All provided signs shall be produced by a single manufacturer who shall be approved by the

Owner and/or the Engineer.

6. Refer to the Department of Transport ITS Design Manual regarding the DMS and LCSCS

gantry types:

6 lane and 4 lane type gantries with cladding

ii.

6 lane and 4 lane standard truss type gantry

iii.

6 lane and 4 lane standard monotube type gantry

DMS display technology shall comply with the following:

1. Sign shall be light emitting diode (LED) technology based with full graphics display and shall

be capable of displaying both English and Arabic alphanumeric characters as well as custom
characters and symbols of various sizes.

2. European Norms, EN 12966 defines several optical parameters to evaluate DMS optical

performance. Each optical parameter is associated with a class of performance. These
parameters are luminance, luminance ratio, beam width, and colour coordinates.

3. The display shall be a full graphics matrix display meeting the following requirements:

LEDs per pixel

– 3 blue, red, and green LED (minimum).

ii.

Visual height of display

– As specified herein this Specification.

iii.

Visual length of display

– As specified herein this Specification

iv.

Number of colours per pixel

–equivalent to 16 levels for each main colour.

Time to switch between different sign aspects and displays shall not exceed 1.0
second. This time is defined as the delay between sign controller’s reception of
a valid signal and complete display of the aspect.

4. Dot pitch shall be fully compliant with BS EN 12966, Annex C graphics requirements, as

approved by the Engineer. Dot pitch shall produce luminance L3 and a luminance ratio equal
or better than R2 as per BS EN 12966.

LCSC display technology shall comply with the following:

1. Sign shall be LED technology based with graphics display and shall be capable of displaying

both numbers and custom characters and symbols of various sizes. Changing from one
message to another shall be instantaneous without visual disturbance. Visual uniformity of
LED colour(s) across the entire display shall be ensured and no visible difference in the
luminous intensity of any pixel in the display at any luminance level for a given colour shall
be noticeable. Display shall meet the following requirements:

Visual height of display

– As shown on the Contract plans but shall not be less Than

850 mm unless otherwise approved by the Engineer.

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ii.

Visual length of display

– As shown on the Contract plans but shall not be less than

850 mm unless otherwise approved by the Engineer.

iii.

Enclosure front size

– 1000 x1000 mm unless otherwise shown on the Contract plans

unless otherwise approved by the Engineer.

iv.

Time to switch between different sign aspects and displays shall not exceed 1.0
second.

2. All LEDs of the same colour proposed for use in the sign shall come from the same LED

component manufacturer's bin and have the same component reference for LED's of the
same type. The subcontractor shall submit written assurances and an explanatory document
from the manufacturer that such requirements can be met. The written assurances and
explanatory document shall be included with the material submittal.

3. LCSC dot pitch definitions shall comply with BS EN12966, Annex C requirements, as

approved by the Engineer.

Subcontractor shall furnish and install queue warning/travel time DMS on the LCSCS
gantries. These signs are overhead mounted and shall be full colour graphic matrix signs.
The minimum size of these signs shall be 2000 x 2000 mm. DMS shall comply with the same
requirements applicable to the full DMS.

Subcontractor shall furnish and install travel time signs as shown in the Contract plans. These
signs shall be mounted on the side and median of the roadway as indicated in the Contract
plans. These signs are fixed traffic signs with a full colour graphic DMS inserts. Minimum size
of the travel time signs shall be 4000 x 4000 mm. DMS inserts shall comply with the
applicable requirements of the full DMS signs. All locations shall have one travel time sign
on each side of the road as indicated in the Contract plans.

DMS and LCSC shall be compatible with BS EN12966, CE or equivalent specifications as
certified by a governmental body and as approved by the Engineer. As a minimum, the
certification shall apply to the design, fabrication, and maintenance of the LED DMS/LCSCS.

Enclosure designs shall comply with the following:

1. Structure of the DMS and LCSCS housings shall be IP55 rated or better for the housing, and

IP54 or better for the ventilation openings. Structure shall be weatherproof and corrosion
resistant. Signs shall comply with BS EN12966, Class T2 requirements for resistance to
temperature change. Control cabinets shall be rated for IP56 protection.

2. Enclosures shall be fully welded to protected against the entry of dust, dirt, water and

undesirable elements and shall be manufactured in rust resistant aluminium and/or
aluminium alloy corresponding to European Aluminium Standards, EN AW 1050, EN AW
6063, EN AW 6005 A and/or EN AW 6060 materials and grades.

3. For overall weight consideration steel enclosures of any type shall not be considered for

designing the DMS enclosure unless otherwise approved by the Engineer. Mass of the DMS
and enclosure shall not exceed 2,300 kg.

4. Enclosure shall be resistant to WL7 class wind pressure (1.4 kN/m2) and TDB2 class

temporary deflection (5 mm.m-1). Subcontractor shall furnish evidence of compliance such
as BS EN 12899 certification in this regard.

5. DMS and LCSC power supplies shall be 220 V AC, 50 Hz with AC/DC converter as per sign

manufacturer  requirements.  DMS  enclosure  shall  contain  at  least  2  of  16  Amp  220  V  AC
power outlet receptacles and one 100 W fire rated light source for maintenance purposes.
LCSC  enclosures  shall  contain  a  13  Amp  220  V  AC  power  receptacles  for  maintenance
purposes. Maximum power consumption used by the DMS including fans and controller shall
not exceed 3 kW.

6. Front Face of enclosures and front protective grids shall be protected by a flat, resistant and

profoundly black finish. Paint quality shall comply with ISO 9227 500 hours salt spray test
Gt0 value.

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Display visibility and viewing angle: DMS and LCSC visibility angle (visual angularity), known as
“beam width”, B4 in BS EN 12966 shall be 20o minimum (±10 horizontal, 10 vertical). Face of
the signs shall be capable of being inclined or declined from the vertical following installation on
site by a minimum of 3o for DMS and 5o for LCSCS, and shall be adjusted as necessary to suit
site conditions to optimize viewing by approaching vehicles as approved by the Engineer.

Luminance control: Sign contrast values shall be compliant with BS EN 12966 standard Class
R2 or R3 for appropriate installation conditions. DMS luminance values shall meet at least BS
EN12966 class L3 luminance level requirements. All LED colours intensity shall comply with BS
EN 12966 class C2 standards as approved by the Engineer.

Communications:  DMS  and  LCSC  shall  communicate  with  the  central  control  unit  via  the
communication  system  architecture.  Compliance  with  the  latest  version  of  applicable  NTCIP
communication  protocols  is  required  and  shall  be  used  in  this  Contract  in  addition  to  other
communications  protocols  as  approved  by  the  Engineer.  As  a  minimum,  IP  over  100  Mbps
Ethernet  communications  shall  be  provided  as  part  of  the  DMS  and  LCSC  communication
protocols.

b. Installation of Dynamic Message Signs

Outdoor dynamic message signs (DMS), including travel time, lane control and speed control
signs (LCSCS) shall be mounted on an overhead support structure as per the site conditions, at
location shown on the Contract plans, and as approved by the Engineer. Where applicable the
LCSCS shall be mounted on special mounting structures as per the site conditions and as
approved by the Engineer.

Service platform (catwalk) between supports for the DMS shall be from end to end, and shall
have easy access by service ladder attached to the upstream side of the structure of the road
side gantry.

Subcontractor shall conduct the detailed design of the DMS and LCSCS mounting structure,
mounting structure foundation, and the sign mounting details in accordance with the sign
manufacturer requirements, the sign installation site details, and as approved by the Engineer.

Subcontractor  shall  submit  to  the  Engineer  for  review  and  approval  sign  mounting  details,
mounting structure foundation details, structural analysis calculations, and vibration analysis of
the mounting structure as per each site and sign specific requirements and in accordance with
sign  manufacturer  recommendations  prior  to  installing  the  mounting  structure.  All  mounting
structures shall be made from hot dip galvanized steel or from stainless steel. All drawings and
calculations of the sign mounting structure as well as its proposed materials and components
shall  be  submitted  to  the  Engineer  for  approval  prior  to  commencing  any  manufacturing  or
construction work on the structure.

An analysis shall be submitted to the Engineer for approval prior to manufacturing of the sign
mounting structure, and include the following:

1. Overall analysis of structure as per BS EN 12899.

2. Vibration analysis of gantry structure as per BS EN 12966.

3. Wind resistance analysis according to 120 km/h wind load.

4. Seismic analysis of structure according to UBC 97

5. Analysis of welding points and their thicknesses

6. Analysis of bolts and screws located at main joints of structure

7. Fatigue analysis of welding, bolts and nuts and overall gantry structure for a 15 year DMS

and LCSCS system life.

All outer parts of frame shall be aluminium, stainless steel, or as approved by the Engineer. All gantry
structures shall have cladding as shown on the Contract plans. Cladding, colour, pattern, size and

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materials if it is part of the structure, shall be as approved by the Engineer. Paint shall be UV resistant
and certified by an independent laboratory according to ISO 9227, 500 hours salt spray test as Gt0.

All fasteners, screws, nuts, bolts and washers etc. used in the gantry frame and cladding shall be
provided in stainless steel or suitable nonferrous A4 quality material.

Subcontractor shall conduct all subsurface geotechnical borings for each DMS/LCSCS sign final
location to determine soil features used in conjunction with sign mounting structure foundation
designs. The findings shall be submitted to the Engineer for review and approval.

If requested by the Engineer and depending on the exact location details of each sign, the
Subcontractor shall ensure that the gantry or cantilever design has a vertical angle adjustment
mechanism adequate to adapt the DMS/LCSCS to the local roadway geometry.

Gantry height at the lowest point of arms shall not be less than 6.5 m, or as indicated on the Contract
plans, as approved by the Engineer.

Projecting portion of the foundation anchor bolts and the nut and washer shall be treated by hot dip
galvanizing.

All anchor bolts, ground rods and PVC raceways or conduits shall be located securely in position by
the use of templates during the placing of foundation concrete.

Once the DMS/LCSCS is installed, several types of civil works may be required by the main
Contractor to remediate any disturbance to the DMS installation site, as approved by the Engineer.
These include, but not by way of limitation, site grading, landscaping and planting, and/or concreting.

c. Portable Variable Message Signs

Contractor  shall  provide  and  install  portable  variable  message  signs  (PVMS)  as  part  of  his
maintenance  of  traffic  requirements  (per  Section  1.19.14,  Traffic  control,  detour  schemes  and
pedestrian safety, of Chapter 1) to warn drivers about construction and construction detours ahead.
Display area of the PVMS shall be 3 m² (usually sized 2 x 1.5 m) at least. Characters shall be 360
mm high minimum. It shall have a high-resolution full graphic display with single colour and variable
brightness  levels  with  low  energy  consumption  and  at  least  30°  wide  viewing  angle.  It  shall  have
control options through a local keyboard, through cable and/or wireless LAN, or through GSM and
modem remote control. It shall be solar powered with mandatory battery backup and with a local
power source and generator source option. It shall have a minimum of 99 Arabic and English user-
programmable  and  pre-programmed  messages  and  pictograms,  with  all  international  traffic  signs
graphically preloaded.

PVMS shall be rugged, made of galvanized steel and easy to operate, maintain, and manoeuvre.
Trailer shall have a proper suspension system, parking brake, corrosion protected mechanical
equipment, properly configured hydraulic mechanism, and an adjustable hook height for use with
different types of puller vehicles. Battery and hydraulic boxes shall be of durable fabrication, lockable,
hinged, ventilated, and mounted to the trailer frame to protect batteries and hydraulic components
from weather and vandalism. Control box shall be of durable fabrication, lockable, hinged, ventilated,
and mounted to the trailer frame to protect the instrument panel and electronic controls from weather
and vandalism.

PVMS shall not weigh more than 1,300 kg. Typical dimensions shall not exceed 5,500 x 1,750 mm.

9.6.2.6

Installation of Portable Variable Message Signs

The Contractor shall furnish and install LED-based portable variable message signs (PVMS) during
various stages of the project to alert drivers to construction activities and hazards.

PVMS shall be mounted on a trailer that can be towed and placed at the work zone location as
directed or approved by the Engineer. PVMS may be also known as mobile variable message signs,
mobile dynamic message signs, trailer-mounted variable message signs, and mobile changeable
message signs.

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The sign shall be equipped with an electro-hydraulic raising/lowering mechanism. A manual brake
winch and pulley system shall also be provided for emergency cases. The sign shall be able to be
securely locked either during transport or in the display height position. The sign shall be able to
rotate and securely lock in any position. The sign height in the “raised” position shall not exceed 4m.

The sign shall be delivered with a complete remote control system including, but not limited to, laptop,
all required operation and maintenance manuals and software, as well as hands-on training for the
operator. The PVMS shall be equipped with a GPS system to confirm its location to the project
construction operations manager.

The PVMS power supply shall include internal sensing capability to adjust LED brightness in all
visibility conditions and times of the day.

Lighting: A twofold halogen warning light system shall be attached to the top of the mobile advance
digital board.

Warning light shall have the following salient features:

1. Two (2) fold halogen warning lights in accordance with WL7, EN 12352 L9 350mm diameter

lamps

2. Automatic day and night adjustment

3. 12/24 Volt rechargeable battery power supply

4. The two fold halogen warning light system shall be furnished with rechargeable batteries,

12V, 230 Ah and an auto charger device for lead and lead gel accumulators, complete with
replacement bulbs, lenses and other associated ancillary items to ensure continuous
operation of the warning light system.

9.6.2.7

Overheight Vehicle Detection System

Subcontractor shall deploy an overheight vehicle detection system (OHVDS) that provides detection
of overheight vehicles approaching height-limited structures, as shown on the Contract plans,
required in the Particular Specifications and included in the Bills of Quantities. System shall be able
to provide warning to operators of such vehicles, and to provide a safe exit from the roadway prior
to the height-limited structure. In addition, the system shall detect and record violations and shall be
able to implement secondary protection measures where necessary. Overheight vehicle detection
system shall comply with the requirements of the Abu Dhabi

Traffic Signals and Electronic Warning

and Information Manual

Incident prevention shall function as follows:

1. OHVD shall detect the presence of an over height vehicle on the roadway leading to the

height-restricted area. Traffic control centre shall be notified electronically and immediately
of the offending vehicle.

2. A combination of audible alarms, alternating variable message sign, flashers and a backlit

warning sign shall be triggered in a timely manner to warn the driver of the potentially
hazardous vehicle and to provide directions for immediate route exits prior to impacting a low
clearance overpass ahead.

3. If the offending vehicle continues to approach the height-restricted area past the initial OHVD

detector, a second OHVD station shall report the threat instantly to the traffic control centre
and shall deploy secondary protection measures if they are considered necessary

a. Field Equipment

Alternate  detection technology  of  overheight  vehicles  (such  as  overhead  laser  scanners) may  be
proposed by the Contractor for review.  Procurement or deployment of alternate detection devices
or  system  shall  not  be  allowed  without  written  approval  by  the  Engineer.    Otherwise,  the
Subcontractor shall comply with the requirements of this section.

YSTEM

Subcontractor shall furnish, install, integrate, configure, and test an overheight vehicle detection
system with the following components:

1. Overheight vehicle detector system (including transmitter and receiver units with direction of

travel determination capability). These shall be placed on opposite sides of the roadway for
light beam emission. Detection of offending vehicles shall occur when the said beams are
broken by an overheight vehicle. The OHVDS shall have built-in safeguards to minimize false
alarms. The detector shall include the following items:

Sensor: Sensors shall be placed ahead of the warning sign at a sufficient distance
to allow the offending driver to observe the sign for at least 3 seconds at the
maximum roadway speed.

ii.

Mounting: OHVDS sensors and equipment enclosure shall be mounted on poles
or other structures of sufficient height and of construction similar to that specified
elsewhere for CCTV poles. Mounting systems provided by the system
manufacturer shall be preferred.

iii.

Foundations: Pole foundations shall be consistent with manufacturing
requirements and shall conform to these Specifications and Contract plans.

2. Variable message signs (VMS) for displaying warnings and directions to motorists. These

shall be as specified herein these Specifications for the traveller information systems for Type
4 DMS (4,000 mm x 2,000 mm). However, full range of capabilities shall not be required as
directed by the Engineer. The warning VMS signs and associated gantry, pole, and
foundations shall be compatible with the general VMS specifications given elsewhere in this
specification with the following exceptions:

Sign type: Sign shall be blankout type intended to display a single message. As a
result there is no requirement for full graphic matrix or for full colour.

ii.

Sign activation: Sign shall be activated automatically by OHVDS sensor.

iii.

Additional warning features: VMS sign shall be equipped with flashing strobes and
beacons.

3. Alarm bell for audible warning shall have a parabolic shield for sound direction and reduction

as necessary. Bell shall provide sound output of 100 dB or higher at 3 m. Sound output to
the sides and rear shall be reduced by the use of shield by at least 50 %. Equipment shall be
compatible with mounting and power provided to the warning sign location.

4. Maximum height limit and high vehicle exit sign shall comply with the requirements of the

Abu Dhabi Traffic Signals and Electronic Warning and Information Manual. Maximum height
limit sign shall be placed ahead of the height-limited structure in a location which allows for
a safe exit of an overheight vehicle. Sign shall be placed prior to the overheight vehicle exit
at a distance sufficient to allow time for the offending vehicle to change lanes if necessary
and take the provided exit. High vehicle exit sign shall contain audio and visual overheight
indicators and provide a clear exit direction to motorists. Sign shall comply with the following
items:

Mounting: Signs shall be mounted on poles or other structures of sufficient height
and of construction in accordance with the requirements of the Department of
Transport Manual of Uniform Traffic Control Devices. Mounting systems provided
by the system manufacturer shall be preferred.

ii.

Foundations: Pole foundations shall be consistent with manufacturing
requirements and shall conform to the Article 9.2.3.2 and the Contract plans.

5. Secondary protection devices shall be provided in cases where height restricted structure is

sensitive and requires additional active protection measures as shown on the Contract plans,
as required by the Particular Specifications and where included in the Bills of Quantities, as
approved by the Engineer.

9.6.2.8

Roadway Weather Information System

Subcontractor shall furnish, install, integrate, configure, and test a roadway weather information
system (RWIS), including the head-end server, for the purpose of monitoring roadway atmospheric

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and pavement environmental conditions. RWIS shall incorporate continuous monitoring and
measuring of air pollutants in accordance with the relevant authority. Subcontractor shall co-ordinate
with the relevant authority about installing and operating weather stations. RWIS shall comply with
the requirements of the Abu Dhabi

Traffic Signals and Electronic Warning and Information Manual.

RWIS shall provide the following measurements as directed by the Engineer:

1.  Air temperature (high / low / current)
2.  Humidity
3.  Solar radiation
4.  Wind speed and direction (gusts and sustained)
5.  Precipitation
6.  Visibility
7.  Fog detection
8.  Noise measurement
9.  Pavement condition
10. Air quality

– CO, NOx, H

S, CH

, HC, BETX, PM

, PM

2.5

a. Field Equipment

RWIS  shall  include  a  sensor  tower  used  for  mounting  of  all  sensors,  video  surveillance
camera,  local fence  and  equipment  enclosure,  local  data  logger  for  data  storage,  and the
necessary site and traffic management centre/control room hardware and software to transfer
the weather and air quality data to other agencies such as Environment Agency Abu Dhabi
(EAD)  or  other  applicable  authority.  Weather  sensors  shall  be  placed  at  least  3  m  above
ground for added security and protection against vandalism”.

b. RWIS Tower and Foundation

Each weather station shall be provided with a self supporting tower, including foundation,
which provides mounting space for the weather sensors, ground clearance to facilitate sensor
accuracy, and some degree of physical security for the sensor equipment. Tower shall also
provide mounting capability for the data logger/network interface equipment.

Tower shall be designed to support the static load from the weather station equipment, and
the dynamic load resulting from wind speeds of up to 120 km/hr.

Subcontractor shall include the necessary signal and power conduits, connections to backbone
communications network, utility power connections, pole and tower foundations, guard rails, fencing,
bollards, etc as required for an operation roadway weather information system communications
system

c. Communications Subsystem

All communications for the RWIS shall be primarily based on a single mode (SM) fibre optic
backbone communications system. Communications system cables shall be routed from individual
intersections in dedicated, concrete encased conduits, as shown on the Contract plans and as
approved by the Engineer.

Communications backbone shall be compliant with communications industry international standards.
As a minimum, the following communications interfaces shall be provided, including PAL video,
10/100/1000 Mbps Ethernet, and low speed RS-232/422.

In the case of Fiber Optics (FO) used, the Subcontractor shall install a backbone communications
system based on active access nodes linked by optical fibres forming a reliable and redundant high
speed medium for the transparent transport of voice, data, LAN and video services.

As the transmission system will be used as a backbone network, the system shall have following
characteristics:

1. High availability
2. High reliability

Abu Dhabi, United Arab Emirates. STANDARD CONSTRUCTION SPECIFICATIONS (PART 1 - ROADS, Second Edition 2020) - page 53