Standard Specifications for Road, Bridge, and Municipal Construction 2020 (M 41-10)

Page 8-126

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

Prior to installation all relocated metal light standards shall have existing painted
identification markings removed. Manufactures Identification tag shall not be removed.
Damaged surfaces and coatings shall be repaired with material matching the existing
coating.

All new light standards shall have an approved metal tag riveted to the pole
above the handhole. The information provided on the tag shall be as noted on the
preapproved drawings.

All new and relocated metal light standards shall be numbered for identification using
painted 4 inch block gothic letters (similar to series C highway lettering) and numbers
installed 3 feet above the base facing the Traveled Way. Paint shall be black enamel alkyd
gloss conforming to Federal Specification TT-E-489. The following information shall be
provided as shown in the Plans:

CC-SSSS

VVV

Where:

NN = Is the pole number as identified in the Plans. May be one or more characters.

= Is the circuit letter as identified in the Plans. May be one or more characters.

SSSS = Is the service cabinet number as identified in the Plans. Do not include the

two or three letter prefix. Up to four digits - do not include leading zeros.

VVV = Is the operating voltage of the luminaire. Always three digits.

In setting timber poles, the Contractor shall provide a minimum burial of 10 percent of the
total pole length plus 2 feet and shall rake the poles as shown in the Plans.

8-20.3(13)B

Vacant

8-20.3(13)C

Luminaires

The Contractor shall mark the installation date on the inside of the luminaire ballast or
driver housing using a permanent marking pen.

All luminaires shall be mounted level, both transverse and longitudinally, as measured
across points specified by the manufacturer. Leveling and orientation shall be
accomplished after pole plumbing.

8-20.3(13)D

Sign Lighting

Sign illumination equipment shall include fixtures, brackets, conduit, electrical wire, and
other material required to make the sign lighting system operable. Sign illumination
fixtures shall be fused according to the table in

Section 9-29.7

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

8-20.3(13)E

Sign Lighting Luminaires

The sign lighting luminaire shall be supported by a lighting bracket assembly as detailed
in the Plans. If the sign Structure includes a maintenance walkway, the luminaire fixture
mounting plate shall be bolted to the walkway grating.

An isolation switch shall be provided in the line side conductors, mounted over the
Shoulder to de-energize all luminaires for maintenance purposes. The switch shall be
single pole, single throw, or double-pole, single throw as necessary to open all conductors
to the luminaires other than neutral and ground conductors. The switch shall contain 600-
volt terminal strips on the load side with solderless box lugs as required plus 4 spare lugs
per strip. The switch enclosure shall be rated NEMA 3R.

8-20.3(14) Signal Systems

8-20.3(14)A

Signal Controllers

All control cabinets and control equipment shall be factory wired ready for operation.
Field work will be limited to placing cabinets and equipment and connecting the field
wiring to field terminal strips. All controller cabinets shall be installed on a silicone seal
pad.

Controllers for portable traffic signal systems shall conform to the requirements of

Section 9-29.13(7)

8-20.3(14)B

Signal Heads

Unless ordered otherwise by the Engineer, signal heads shall not be installed at any
intersection until all other signal equipment is installed and the controller is in place,
inspected, and ready for operation at that intersection, except that the signal heads may
be mounted if the faces are covered to clearly indicate the signal is not in operation.

Three section displays mounted on type M mounts shall have the plumbizer between the
top and second display. Four and five section vertical displays mounted on type M mounts
shall have the plumbizer between the second and third display.

8-20.3(14)C

Induction Loop Vehicle Detectors

Induction loops shall be constructed as detailed in the Contract and the following:
1. Loop wire shall conform to

Section 9-29.3

2. Lead-in cable shall conform to

Section 9-29.3

3. All loops shall be installed after grinding or prior to paving the final lift of asphalt

designated in the Contract. Loop conductors shall be held at the bottom of the saw
cut by high temperature backer rod (sized to fit snugly in the saw cut). Two-inch-long
pieces of the backer rod shall be installed on 24-inch centers along the entire loop
and home run(s) and at the entrance and exit of all turns greater than 45 degrees.
If new loops are installed over existing the old loops shall be removed by grinding
and the grinding shall be deep enough to destroy any existing operational loop
conductors. If not listed as incidental to another item or paid for under another Bid

Page 8-128

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

item the additional Work to remove the existing loops shall be paid in accordance
with

Section 1-04.4

4.  Each loop shall be the size and number of turns indicated in the Plans.
5.  No loop installation will be done in rainy weather or when the pavement is wet.
6.  All sawcuts shall be cleaned with a high-pressure washer and dried with 100 psi

minimum air pressure, to the satisfaction of the Engineer. If traffic is allowed over the
sawcut prior to wire installation, the sawcuts shall be cleaned again.

7. Wiring shall be installed with a blunt-nosed wooden wedge.
8. Prior to the installation of the high temperature backer rod all slack shall be removed

from the wiring. Kinks in wiring or folding back of excess wiring will not be allowed.

9. High temperature backer rod, sized for snug fit shall be installed in the saw cut on

2-foot centers and at all sharp turns.

10. Install sealant as per Contract or as approved by the Engineer.
11. Sealant shall be applied such that air bubbles or foam will not be trapped in

the sawcut.

8-20.3(14)D

Test for Induction Loops and Lead-In Cable

All tests shall be performed by the Contractor in the presence of the Engineer for each
loop. The tests shall be performed at the amplifier location after complete installation of
the loop. All costs associated with testing shall be included in the unit Contract prices of
the respective Bid items.

Test A – The DC resistance between the two lead-in cable wires will be measured by
a volt ohmmeter. The resistance shall not exceed 10 ohms.
Test B – A megohm meter test at 500 volts DC shall be made between the lead-in
cable shield and grounding, prior to connection to grounding. The resistance shall
equal or exceed 100 megohms.
Test C – A megger test shall be made between the loop circuit and grounding. The
resistance shall equal or exceed 100-megohms.
Test D – An inductance test to determine the inductance level of each inductance
loop. The Contractor shall record the inductance level of each inductance loop
installed on the project and shall furnish the findings to the Engineer. An inductance
level below 150 microhenries is considered a failure for a Type 1 loop, any one round
loop and an inductance level below 75 microhenries is considered a failure for a Type
2 loop.

If any of the installations fails to pass all tests, the loop installation or lead-in cable shall
be repaired and replaced and then retested.

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

8-20.3(14)E

Signal Standards

Traffic signal standards shall be furnished and installed in accordance with the methods
and materials noted in the Contract and the following:
1. All dimensions and orientations will be field verified by the Engineer prior to

fabrication.

2. The signal standard component identification shall conform to details in the Plans.
3. Disconnect connectors complete with pole and bracket cable shall be installed in any

signal standard supporting a luminaire. Illumination wiring installation shall conform
to details in the Plans for slip base wiring.

4. No field drilling will be allowed on signal mast arms except for the installation of any

required pre-empt indicators, pre-empt detectors, microwave detector, or type “N”
signal mountings. The maximum diameter shall be 1 inch.

5. All pole entrances required for pole-mounted signal heads, cabinets, signs,

pedestrian push button assemblies, etc., shall be field drilled.

6. Damage to the galvanized pole surface resulting from field drilling shall be repaired

with approved zinc rich paint.

7.  Field welding will not be allowed, except as shown in the Plans.
8.  All tenons shall be factory installed.
9.  All welding shall be completed prior to galvanizing.
10.  Foundations shall be constructed to provide the pole orientation noted in the

Plans. Anchor bolts shall be tightened in accordance with Sections

6-03.3(33)

and

8-20.3(4)

11. Slip base installation for Type RM and FB signal standards shall conform to the slip

base installation requirements specified in

Section 8-20.3(13)A

, except that the

specified torque for the ¾-inch diameter clamping bolts shall be 50 foot-pounds.

12. The pole shall be plumbed after signal heads are installed.
13. The space between the bottom base plate and the top of foundation shall be filled

with grout with a ⅜-inch plastic drain tube.

Signal standards shall not be erected on concrete foundations until the foundations have
attained 2,400 psi or 14 days after concrete placement. Signal standards without mast
arms may be erected after 72 hours. Type IV and V strain pole standards may be erected
but the messenger cable (span wire) shall not be placed until the foundation has attained
2400 psi or 14 days after concrete placement.

Page 8-130

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

Signal supports used with portable traffic signal systems shall provide a minimum of two
signal displays, spaced a minimum of 8 feet apart.

When portable traffic signals are used to provide alternating one-way control, a minimum
of one of the signal displays shall be suspended over the Traveled Way. The minimum
vertical clearance to the Traveled Way for this signal display is 16′ 6″.

Timber strain poles shall be set a burial depth of 10 percent of the total length plus 2 feet
and shall be raked as noted in the Plans.

8-20.3(15) Grout

Grout shall conform to the requirements of Section

6-02.3(20)

and

9-20.3(4)

8-20.3(16) Reinstalling Salvaged Material

When the Contract requires salvaged electrical equipment to be reinstalled, the
Contractor shall furnish and install all necessary materials and equipment, including
anchor bolts, nuts, washers, concrete, etc., required to install the salvaged equipment.

8-20.3(17) “As Built” Plans

Upon Physical Completion of the Work, the Contractor shall submit corrected shop
drawings, schematic circuit diagrams, or other drawings necessary for the Engineer to
prepare corrected Plans to show the Work as constructed.

These drawings shall be on sheets conforming in size to the provisions of

Section 1-05.3

8-20.4 Measurement

Conduit of the kind and diameter specified will be measured, through the junction boxes,
by the linear foot of conduit placed, unless the conduit is included in an illumination
system, signal system, intelligent transportation system, or other type of electrical system
lump sum Bid item.

Casing will be measured by the linear foot for the actual length of casing placed, unless
the casing is included in an illumination, signal, or other electrical system lump sum
Bid item.

Directional boring will be measured by the linear foot for the length of the boring tunnel.

Illumination, Traffic Signal Systems, Intelligent Transportation Systems, and Electrical

8-20

8-20.5 Payment

Payment will be made for each of the following Bid items that are included in the
Proposal:

“Illumination System ____”, lump sum.
“Traffic Signal System ____”, lump sum.
“ITS ____”, lump sum.
The lump sum Contract price for “Illumination System, ____”, “Traffic Signal System
____”, or “ITS _____” shall be full pay for the construction of the complete electrical
system, modifying existing systems, or both, including sign lighting systems,
as described above and as shown in the Plans, and herein specified, including
excavation, backfilling, concrete foundations, conduit, wiring, restoring facilities
destroyed or damaged during construction, salvaging existing materials, and for
making all required tests. All additional materials and labor, not shown in the Plans or
called for herein and which are required to complete the electrical system, shall be
included in the lump sum Contract price.
“Conduit Pipe ____ In. Diam.”, per linear foot.
The unit Contract price per linear foot for “Conduit Pipe____ In. Diam.” shall be full
pay for furnishing all pipe, pipe connections, elbows, bends, caps, reducers, conduits,
unions, junction boxes, and fittings; for placing the pipe in accordance with the
above provisions, including all excavation, jacking, or drilling required, backfilling of
any voids around casing, conduits, pits, or trenches; restoration of native vegetation
disturbed by the operation, chipping of pavement, and bedding of the pipe; and all
other Work necessary for the construction of the conduit, except that when conduit
is included on any project as an integral part of an illumination, traffic signal, or ITS
system, and the conduit is not shown as a pay item, it shall be included in the lump
sum price for the system shown.
All costs for installing conduit containing both signal and illumination wiring shall be
included in the Contract prices for the signal system.
All costs for installing junction boxes containing both illumination and signal wiring
shall be included in the Contract prices for the signal system.
“Casing”, per linear foot.
The unit Contract price per linear feet for “casing” shall be full payment for boring,
jacking or drilling for installing casing, and backfilling any voids around the casing and
pits or back filling of the trenches required to install the casing. This cost will also
include any restoration of native vegetation disturbed by the operation.
“Directional Boring”, per linear foot
The unit Contract price per linear foot for “Directional Boring”, shall be full pay for
furnishing all labor, materials, equipment and electrical supervision associated with
the directional boring.

Page 8-132

Permanent Signing

8-21

Permanent Signing

8-21.1

Description

This Work consists of furnishing and installing permanent signing, sign removal, sign
relocation, and refacing existing signs in accordance with the Plans, these Specifications,
and at the locations shown in the Plans or where designated by the Engineer.

8-21.2 Materials

Materials shall meet the requirements of the following sections:

Roadside Sign Structures

9-06.16

Permanent Signs

9-28

Sign Support Structures

9-28.14

The Contractor shall submit a Manufacturer’s Certificate of Compliance for all permanent
signs in accordance with

Section 1-06.3

; a copy of the Manufacturer’s Certificate of

Compliance shall be available at the fabricator’s plant. Permanent signs will be inspected
at the fabricator’s plant prior to shipment to the project unless otherwise accepted by the
Engineer. Signs without an approved decal will not be installed on the project with the
exception of double-faced signs which do not receive decals or fabricator’s stickers.

8-21.3

Construction Requirements

8-21.3(1) Location of Signs

Signs are located in the Plans by station numbers. These are tentative locations subject
to change by the Engineer. The post lengths specified in the Plans are estimated for Bid
purposes only. Final lengths of timber posts will be determined or verified by the Engineer
at the request of the Contractor prior to fabrication. Final lengths of steel posts will be
determined by the Engineer prior to fabrication.

8-21.3(2) Placement of Signs

All reflectorized signs located less than 30 feet from the edge of the lane should be
turned out approximately 3 degrees from the pavement edge of oncoming traffic
lanes, and those located 30 feet or more from the edge of the lane should be turned in
approximately 3 degrees from the pavement edge of oncoming traffic lanes. All sign posts
shall be plumb and signs level. The signs shall be inspected at night by the Engineer and,
if specular glare occurs from failure to install at 3 degrees as stipulated, the Contractor
shall reinstall the signs at no expense to the Contracting Agency. The post holes shall
be of sufficient dimensions to allow placement and thorough compaction of selected
backfill material completely around the post. Selected backfill material shall consist of
earth or fine sandy gravel free from organic matter with no individual particles exceeding
1½ inches in diameter.

Permanent Signing

8-21

8-21.3(3) Sign Covering

When notified by the Engineer, the Contractor shall cover or uncover certain signs to
facilitate and control the operation of the project. The covering shall consist of 4 mils
minimum thickness black polyethylene sheeting of sufficient size to entirely cover the
sign, unless otherwise approved by the Engineer, and shall extend over the edges of the
sign and fastened on the back. The Contractor shall not use any type of adhesive tape
on the face of the signs. Other methods of covering may be considered if approved by
the Engineer.

8-21.3(4) Sign Removal

Where shown in the Plans or ordered by the Engineer, the existing signs and, if so
indicated, the sign Structures shall be removed by the Contractor.

Sign Structures shall include sign bridges, cantilever sign Structures, bridge-mounted sign
brackets, and any other sign-mounting Structure shown in the Plans to be removed by the
Contractor.

The embedded anchors attaching signs and sign Structures specified for removal to
existing concrete Structures shall be removed a minimum of 1 inch beneath the existing
concrete surface. The void left by removal of the embedded anchors shall be coated
with epoxy bonding agent and filled with mortar conforming to

Section 9-20.4(2)

. The

epoxy bonding agent shall be Type II, conforming to

Section 9-26.1

, with the grade and

class as recommended by the epoxy bonding agent manufacturer and as approved by the
Engineer. The mortar shall consist of cement and fine aggregate mixed in the proportions
to match the color of the existing concrete surface as near as practicable.

Where indicated, the Contractor shall remove concrete pedestals to a minimum of 2 feet
below Subgrade or finished ground elevation and backfill the hole to the satisfaction of
the Engineer. Where an existing sign post is located within a sidewalk area, the Contractor
shall remove the post and finish the area so as to make the sidewalk continuous. Where
signs are removed from existing overhead sign Structures, the existing vertical sign
support braces shall also be removed. The removed aluminum signs, wood signs, wood
sign posts, wood structures, metal sign posts, wind beams, and other metal structural
members and all the existing fastening hardware connecting such members shall become
the property of the Contractor and shall be removed from the project. Salvage value of
the removed signs and sign Structure members shall be reflected in the Contractor’s Bid
price for other items of Work.

Page 8-134

Permanent Signing

8-21.3(5) Sign Relocation

Where shown in the Plans, the existing signs and, if so indicated, the sign Structures shall
be relocated by the Contractor to the location noted. Where the existing sign Structure is
mounted on concrete pedestals, the Contractor shall remove the pedestal to a minimum
of 2 feet below finished grade and backfill the remaining hole with material similar to that
surrounding the hole. Where the existing Structure is to be relocated, the Contractor shall
provide necessary materials, labor, and hardware, and if so indicated, electrical conduit,
conductors, etc., electrical services, and connections so as to erect and provide an
operable unit to the satisfaction of the Engineer. All materials damaged by the Contractor
shall be replaced at no cost to the Contracting Agency. Unless otherwise allowed,
relocation of each existing sign and Structure shall be accomplished during the day in
which it was removed. Relocation of overhead signs and Structures shall be accomplished
during the hours between 12 midnight and 4:00 a.m. or as approved by the Engineer.

8-21.3(6) Sign Refacing

Where indicated in the Plans or in the Special Provisions, the Contractor shall reface
existing signs with sheet aluminum overlay panels. Unless otherwise indicated in the
Plans or allowed by the Engineer, all Work shall be accomplished while the existing sign is
in place. Modifications to each sign shall be completed during the same day in which the
Work is commenced.

Prior to the installation of overlay panels, the existing legend (message and border) shall
be removed. The aluminum overlay panels shall be butt jointed. Aluminum or stainless
steel screws, a minimum of ½ inch in length, shall be used to attach overlay panels to
existing plywood signs. In addition to the screws, two ¼-inch diameter by 1-inch-long
aluminum or stainless steel bolts shall be installed through the top of each panel and the
plywood sign. Aluminum blind rivets shall be used to attach overlay panels to existing
aluminum signs. Screws or rivets shall be installed at 24-inch centers. Unless otherwise
noted, sign background material shall be in accordance with

Section 9-28

After installation of overlay panels, the existing legend shall be reinstalled or, where
indicated in the Plans, new legend or portions thereof shall be furnished and installed by
the Contractor. Direct applied legend shall be applied to the new face prior to resurfacing.
Layout and letter spacing shall be in accordance with Contracting Agency standards
unless otherwise approved by the Engineer. New legend components shall be of the same
type and size as the existing materials, and it shall be the Contractor’s responsibility to
verify material type and size. Materials damaged by the Contractor shall be replaced at no
expense to the Contracting Agency.

Permanent Signing

8-21

8-21.3(7) Sign Message Revision

Where indicated in the Plans or in the Special Provisions, the Contractor shall revise
existing sign messages or layouts. The Contractor shall remove and reinstall portions of or
all of the existing message or furnish and install new message components as necessary
to provide the revised message as indicated. Prior to installing the revised message,
the Contractor shall thoroughly clean the sign face and plug all existing rivet holes with
aluminum blind rivets painted the same color as the sign background. Plugging screw
holes in plywood signs will not be required. Modifications to the sign shall be completed
during the same day in which Work is commenced and while the sign is in place. All
new materials necessary to accomplish this Work shall be the same type and size as
the existing components, and it shall be the Contractor’s responsibility to verify such
component type and size. Materials damaged by the Contractor shall be replaced at no
expense to the Contracting Agency. Existing materials not reinstalled shall become the
property of the Contractor and shall be removed from the project.

8-21.3(8) Sign Cleaning

Signs shall be cleaned after relocation or installation to the satisfaction of the Engineer.
The Contractor shall not use cleaning solvents that would be harmful to the sign finish.

8-21.3(9) Sign Structures

8-21.3(9)A

Fabrication of Steel Structures

Fabrication shall conform to the applicable requirements of

Sections 6-03

and

9-06

All welded connections of sign bridge and cantilever sign Structure posts, arms, and
beams, including base and connection plates, shall be cleaned prior to welding to remove
all mill scale from within 2 inches of the weld. As an alternative to the blast cleaning
requirements of

Section 6-03.3(13)

, the Contractor may perform the cleaning using power

hand tools as approved by the Engineer. Unless otherwise specified in the Plans or Special
Provisions, metal surfaces shall not be painted.

All fabrication, including repairs, adjustments or modifications of previously fabricated
sign structure members and connection elements, shall be performed in the shop, under
a Working Drawing prepared and submitted by the Contractor for the original fabrication
or the specific repair, adjustment or modification. Sign structure fabrication repair,
adjustment or modification of any kind in the field is not permitted. If fabrication repair,
adjustment or modification occurs after a sign structure member or connection element
has been galvanized, the entire member or element shall be re-galvanized in accordance
with AASHTO M 111.

Page 8-136

Permanent Signing

8-21.3(9)B

Erection of Steel Structures

Erection shall conform to the applicable requirements of

notwithstanding, the Contractor may erect a sign bridge prior to

completion of the shaft cap portion of one foundation for one post provided the following
conditions are satisfied:
1. The Contractor shall submit a Type 2E Working Drawing consisting of design

calculations and details of the temporary supports and falsework supporting the
sign bridge near the location of the incomplete foundation. The submittal shall
include the method of releasing and removing the temporary supports and falsework
without inducing loads and stress into the sign bridge.

2. The Contractor shall submit a Type 2 Working Drawing consisting of the method

used to secure the anchor bolt array in proper position with the sign bridge while
casting the shaft cap concrete to complete the foundation.

3. The Contractor shall erect the sign bridge and temporary supports and falsework,

complete the remaining portion of the incomplete foundation, and remove the
temporary supports and falsework, in accordance with the accepted Working
Drawings.

8-21.3(9)C Timber

Posts

Timber sign posts shall conform to the requirements of

Section 9-28.14(1)

8-21.3(9)D

Aluminum Structures

Welding of aluminum shall be in accordance with

Section 9-28.14(3)

8-21.3(9)E

Bridge Mounted Sign Brackets

The Contractor shall fabricate and install sign supports for mounting signs on bridge
Structures at the locations and as shown in the Plans, including inserts and anchor
bolts. Fabrication and installation shall be in accordance with applicable requirements of
Sections

6-03

and

9-06

. Metal surfaces shall not be painted.

The quantity of structural carbon steel shown in the Contract is listed only for the
convenience of the Contractor in determining the volume of Work involved and is not
guaranteed to be accurate. The prospective Bidders shall verify this quantity before
submitting a Bid. No adjustments other than for approved changes will be made in the
lump sum Contract price for the bridge mounted sign brackets, even though the actual
quantity of structural carbon steel required may deviate from that listed.

Permanent Signing

8-21

8-21.3(9)F Foundations

The excavation and backfill shall conform to the requirements of

Section 2-09.3

. Where

obstructions prevent construction of planned foundations, the Contractor shall construct
an effective foundation satisfactory to the Engineer.

The bottom of concrete foundations shall rest on firm ground. If the portion of the
foundation beneath the existing ground line is formed or cased instead of being cast
against the existing soil forming the sides of the excavation, then all gaps between
the existing soil and the completed foundation shall be backfilled and compacted in
accordance with

Section 2-09.3(1)E

Concrete placed into an excavation where water is present shall be placed using an
approved tremie. If water is not present, the concrete shall be placed such that the free-
fall is vertical down the center of the shaft without hitting the sides, the steel reinforcing
bars, or the steel reinforcing bar cage bracing. The

Section 6-02.3(6)

restriction for 5-feet

maximum free-fall shall not apply to placement of Class 4000P concrete into a shaft.

Foundations shall be cast in one operation where practicable. The exposed portions shall
be formed to present a neat appearance. Class 2 surface finish shall be applied to exposed
surfaces of concrete in accordance with the requirements of

Section 6-02.3(14)B

Where soil conditions are poor, the Engineer may order the Contractor to extend the
foundations shown in the Plans to provide additional depth. Such additional work shall be
paid for according to

Section 1-04.4

Forms shall be true to line and grade. Tops of foundations for roadside sign structures
shall be finished to ground line unless otherwise shown in the Plans or directed by the
Engineer. Tops of foundations for sign bridges and cantilever sign structures shall be
finished to the elevation shown in the Plans.

Both forms and ground that will be in contact with the concrete shall be thoroughly
moistened before placing concrete; however, excess water in the foundation excavation
will not be permitted. Forms shall not be removed until the concrete has set at least 3
days. All forms shall be removed, except when the Plans or Special Provisions specifically
allow or require the forms or casing to remain.

Foundation concrete shall conform to the requirements for the specified class, be cast-in-
place concrete, and be constructed in accordance with

Sections 6-02.2

and

6-02.3

After construction of concrete foundations for sign bridge and cantilever sign structures,
the Contractor shall survey the foundation locations and elevations, the anchor bolt array
locations and lengths of exposed threads. The Contractor shall confirm that the survey
conforms to the sign structure post, beam, span and foundation design geometry shown
in the Plans prior to completion of the sign structure foundation, and shall identify any
deviations from the design geometry shown in the Plans. When deviations are identified,
the Contractor shall notify the Engineer and submit a Type 2 Working Drawing consisting
of the Contractor’s proposed method(s) of addressing the deviations.

Page 8-138

Permanent Signing

Sign structures shall not be erected on concrete foundations until the Contractor confirms
that the foundations and the fabricated sign structures are either compatible with each
other and the design geometry shown in the Plans, or have been modified in accordance
with this section and as approved by the Engineer to be compatible with each other, and
the foundations have attained a compressive strength of 2,400-psi.

In addition to the basic requirements, sign bridges and cantilever sign structures shall be
installed in accordance with the following:
1. Foundation excavations shall conform to the requirements of

Section 2-09.3(3)

2. Tops of foundations for sign bridges and cantilever sign structures shall be finished

to the elevation shown in the Plans.

3. Steel reinforcing bars shall conform to

Section 9-07

4. Concrete shall be Class 4000P, except as otherwise specified. The concrete for

the shaft cap (the portion containing the anchor bolt array assemblies above the
construction joint at the top of the shaft) shall be Class 4000.

5. All bolts and anchor bolts shall be installed so that two full threads extend beyond

the top of the top heavy-hex nut. Anchor bolts shall be installed plumb, plus or minus
1 degree.

6. Plumbing of sign bridges and cantilever sign structures shall be accomplished by

adjusting leveling nuts. Shims or other similar devices for plumbing or raking will not
be permitted.

7. The top heavy-hex nuts of sign bridges and cantilever sign structures shall be

tightened in accordance with

Section 6-03.3(33)

, and by the Turn-of-Nut Method to

a minimum rotation of ¼ turn and a maximum of ⅓ turn past snug tight. Permanent
marks shall be set on the base plate and nuts to indicate nut rotation past snug tight.

In addition to the basic requirements, roadside sign structures shall be installed in
accordance with the following:
1. Tops of foundations shall be finished to final ground line unless otherwise shown in

the Plans or staked by the Engineer.

2. Steel reinforcement, including spiral reinforcing, shall conform to

Section 9-07.2

3. Unless otherwise shown in the Plans, concrete shall be Class 4000P. Class 4000P

concrete for roadside sign structures does not require air entrainment.

4. The assembly and installation of all Type TP-A or Type TP-B bases for roadside sign

structures shall be supervised at all times by either a manufacturer’s representative
or an installer who has been trained and certified by the manufacturer of the
system. If the supervision is provided by a trained installer, a copy of the installer’s
certification shall be provided to the Engineer prior to installation.

Permanent Signing

8-21

5. For all Type TP-A or TP-B bases, the Contractor shall attach four female anchors to

a flat rigid template following the manufacturer’s recommendations. The Contractor
shall lower the anchor assembly into fresh concrete foundation and vibrate into
position such that the tops of the anchor washers are flush with the finished top
surface of the foundation. The Contractor shall support the template such that all
anchors are level and in their proper position.

Slip base and hinge connection nuts of roadside sign structures shall be tightened using a
torque wrench to the torque, following the procedure specified in the Plans.

8-21.3(9)G

Sign Structure Identification Information

Whenever existing bridge-mounted sign brackets, cantilever sign structures, or sign
bridge structures are removed from their anchorage, whether temporary or permanent,
the Contractor shall provide the sign structure identification information, attached to the
sign structures, to the Engineer. The identification information may be in the form of a
riveted plate, sticker, or other means.

8-21.3(10) Sign Attachment

Sign panels consisting of sheet aluminum or fiberglass reinforced plastic shall be attached
or mounted to signposts or sign structures as shown in the Plans.

Signs not conforming to the above, including all variable message sign (VMS) assemblies
and other message boardtype assemblies, shall be attached or mounted to signposts or
sign structures by means of positive connections—defined as through-bolted connections.
The use of clips or clamps to accomplish the attachment or mounting of such signs and
assemblies is prohibited.

8-21.3(11) Multiple Panel Signs

After installation of multiple panel signs, the Contractor shall furnish and install an
approved reinforced aluminized tape on the reverse side of the sign to prevent visible
light through the seam. The tape shall be pressure sensitive and a minimum of 2 inches
wide and 2 mils thick. In lieu of tape, the Contractor may use 1-inch-wide aluminum
sheeting riveted to the sign back. The aluminum shall be a minimum of 0.032 inch thick.
Rivet heads shall match the sign face color.

8-21.3(12) Steel Sign Posts

For roadside sign structures on Type TP-A or Type TP-B bases, the Contractor shall use
the following procedures and manufacturer’s recommendations:
1. The couplings, special bolts, bracket bolts, and hinge connection nuts on all Type

TP-A or Type TP-B bases shall be tightened using the Turn-of-Nut Tightening
Method to a maximum rotation of ½ turn past snug tight.

2. The Contractor shall shim as necessary to plumb the steel signposts.

Page 8-140

Permanent Signing

For roadside sign structures on all Type PL and SB slip bases, the Contractor shall use the
following procedures:
1. The Contractor shall assemble the steel signpost to stub post with bolts and flat

washers as shown in the Plans.

2. Each bolt shall be tightened using a torque wrench to the torque, following the

procedures specified in the Plans.

For roadside sign structures on SB-1, SB-2, or SB-3 slip bases, the Contractor shall use
the following procedures and manufacturer’s recommendations:
1. The Contractor shall attach the perforated square steel post or solid square steel

post to the upper slip plate with bolts, nuts, and washers as shown in the Plans.

2. The three bolts connecting the upper and lower slip plates shall be tightened to

torque, using a torque wrench, following the procedures in the Plans.

For roadside structures on ST-2 and ST-4 sign supports, the Contractor shall use the
following procedures:
1. The Contractor shall attach the perforated square steel post to the lower sign post

support with bolts, nuts, and washers as shown in the Plans.

8-21.4 Measurement

Sign covering will be measured in square feet of the area of the sign covered.

8-21.5 Payment

Payment will be made for each of the following Bid items that are included in the
Proposal:

“Permanent Signing”, lump sum.
“Sign Bridge No. ____”, lump sum.
“Cantilever Sign Structure No. ____”, lump sum.
All costs in connection with surveying completed concrete foundations for sign
bridges and cantilever sign structures shall be included in the lump sum contract
price for “Structure Surveying”, except that when no Bid item is included in the
Proposal for “Structure Surveying” then such costs shall be included in the lump sum
contract price(s) for “Sign Bridge No. ___” and “Cantilever Sign Structure No. ___”.
“Bridge Mounted Sign Bracket No. ____”, lump sum.
“Sign Covering”, per square foot.

Pavement Marking

8-22

Pavement Marking

8-22.1 Description

This Work consists of furnishing, installing, and removing pavement markings upon the
Roadway surface in accordance with the Plans,

Standard Plans

, the FHWA publication

Standard Alphabet for Highway Signs and Pavement Markings and these Specifications,
at locations shown in the Contract or as ordered by the Engineer in accordance with

Section 1-04.4

Pavement Markings may be either Longitudinal (long) Line Markings or Transverse
Markings. Longitudinal line markings are generally placed parallel and adjacent to the flow
of traffic. Transverse markings are generally placed perpendicular and across the flow of
traffic. Word and symbol markings are classified as transverse markings. Traffic letters
used in word messages shall be sized as shown in the Plans.

8-22.2 Materials

Material for pavement marking shall be paint or plastic as noted in the Bid item meeting
the requirements of

Section 9-34

. Glass beads for paint shall meet the requirements

Section 9-34.4

. Glass beads for plastic shall be as recommended by the material

manufacturer.

8-22.3

Construction Requirements

8-22.3(1) Preliminary Spotting

The Engineer will provide necessary control points at intervals agreed upon with the
Contractor to assist in preliminary spotting of the lines before marking begins. The
Contractor shall be responsible for preliminary spotting of the lines to be marked.
Approval by the Engineer is required before marking begins. Preliminary spotting to guide
the striping machine is required for all longitudinal lines except where a clearly visible
separation is present. Preliminary spotting shall be provided at a spacing of 100 feet
maximum on tangents and 25-feet maximum on curves. The color of the material used for
spotting shall match the color of the permanent marking.

8-22.3(2) Preparation of Roadway Surfaces

All surfaces shall be dry, free of any loose debris, and within the proper temperature range
prior to striping. When required by the pavement marking manufacturer’s installation
instructions, pavement markings that will adversely affect the bond of new pavement
marking material to the roadway surface shall be removed from pavement surfaces in
accordance with

Section 8-22.3(6)

Remove all other contaminants from pavement surfaces that may adversely affect the
installation of new pavement marking.

Standard Specifications for Road, Bridge, and Municipal Construction 2020 (M 41-10) - page 80