Part 1 — General
1.1 Section Includes
A.Ramp Meter Signals and Signing including c onduit, junction boxes , signing, mounting brackets, conductors , grounding, and foundations.
B.State furnished items.
1.2 Related Sections
A.Section 02891: Traffic Signs
B.Section 02892: Traffic Signal
C.Section 13553: ITS Conduit
D.Section 13554: Underground Junction Box
E.Section 13555: ITS Cabinet
F.Section 13591 : Traffic Monitoring Detector Loop
G.Section 13595: ITS Integration, Testing, and Acceptance
H.Section 16530: Electrical Power
1.3 References
A.American Iron and Steel Institute (AISI)
B.Underwriters Laboratories (UL)
C.Manual on Uniform Traffic Control Devices (MUTCD)
1.4 DEFINITIONS Not Used
1.5 Submittals
A.Refer to Section 02892
Part 2 — Products
2.1 Pole Foundation
A.Provide a traffic signal mast arm pole foundation according to 02892 and the SL Series Standard Drawings.
2.2 Ramp Meter Mast Arm Signal Assembly
A.12-inch signal heads – Refer to Section 02892.
1.Provide l ouvered back plate.
2.Do not place retroreflective tape on backplate .
B.RS10 -29A “1 Vehicle Per Green Each Lane” and RS10- 29B “2 Vehicles Per Green Each Lane” Signs: 48 inch x 36 inch. Refer to AT Series Standard Drawings .
C.All signal head housings – Highway y ellow with visor and back panels .
D.Signal Pole – Refer to SL Series Standard Drawings.
2.3 Ramp Meter Advanced Warning
A.Warning Sign – W3-8, 36 inch x 36 inch. Refer to Section 02891, MUTCD, and AT Series Standard Drawings.
B.Traffic Signal Pole – Refer to Section 02892 and SL Series Standard Drawings.
C.Use t wo “Z” bars on the back of the W3 -8 sign to support against thrown snow. Refer to SN Series Standard Drawings.
D.Install solid state flasher relay in the ITS cabinet
2.4 Bolts and Nuts
A.Refer to Section 02892.
2.5 Conductors
A.Refer to Section 02892 for signal cable specifications.
B.Refer to Section 16530 for power conductor specifications.
2.6 Detector Circuit
A.Refer to Section 13591.
2.7 Ground Rod
A.Refer to Section 16530.
2.8 Conduit
A.Refer to Section 16530.
2.9 Underground Junction Box
A.Refer to Section 13554.
2.10 Its Cabinet
A.Refer to Section 13555.
2.11 Mounting Bands and Buckles
A.American Iron and Steel Institute, (AISI) Type 201.
B.Universal Mounting Brackets for Signals mounted on mast arm.
Part 3 — Execution
3.1 Preparation
A.Load, transport, and install all State- Furnished materials according to the manufacturer’s instructions and as shown in the contract.
B.Provide foundations, junction boxes, ground rods, grounding lugs, conduit, signal heads, assemblies, and mounting devices, signs, and all additional equipment required for a complete and operational ramp meter system.
C.Install all wiring, conduit, and junction boxes as shown in the contract. Refer to Sections 13553, 13554, 13555 and 16530.
1.Protect existing conductors while installing new conductors.
D.Connect the controller and all conductors as shown.
E.Furnish and install all incidental items such as wire connectors , grommets, tape connectors, and electrical terminations necessary to make the ramp meter system complete.
F.Clean equipment exterior of all rust and mill scale, dirt, oil, grease and other foreign substances after installation.
3.2 Construct Pole Foundation
A.Refer to Section 02892
3.3 Signal Poles
A.Refer to Section 02892. Install the poles on new concrete bases. Apply rust, corrosion, and anti -seize protection to all threaded assemblies by coating the mating surfaces with an approved compound.
B.Install pole with the hand hole facing away from traffic.
C.Install ground rod according to the contract (NEC 250). Refer to Section 16530.
D.All fasteners and attachment hardware for bands and other equipment must be stainless steel.
E.Adjust the anchor bolt nuts, plumb all steel poles to the vertical with all signal heads and signs installed.
F.Meet AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires , and Traffic Signals for poles.
3.4 Install Wiring
A.Refer to Section 16530.
B.Refer to Section 02892 .
C.Mark cabinet cables with vinyl electrical color -coding tape as specified in Table 1. Refer to UL 510. Lanes numbered from inside shoulder to outside shoulder . Table 1 Cables Marked with Colored Tape Lane One Lane Two Lane Three Ramp Meter Circuit Blue Red Yellow Detector Circuit Blue Red Yellow Advanced Warning Blankout Blue and White Red and White Yellow and White
D.Use Table 2 when connecting the conductors for ramp meter signal heads. Table 2 Color -Coded Conductors All Lanes Ramp Meter Signal Circuit White - Neutral Red- Red indicative Orange- Yellow indicative Green- Green indicative Blue- Enforcement (if present) or spare
E.Use Table 3 and Table 4 for connecting conductors to terminals in the cabinet. Table 3 T4 SP Color Lane 1 3-3 RED 3 2 3-5 YELLOW 3 3-7 GREEN 4 2-3 RED 2 5 2-5 YELLOW 6 2-7 GREEN 7 1-3 RED 1 8 1-5 YELLOW 9 1-7 GREEN 10 N/U N/U Lane 1 is inside lane Table 4 Terminal SP Color Function FT6-16 9 Green Flashers solid output
3.5 Ramp Meter Signal Assembly Sign
A.Refer to Section 02892 .
3.6 Install Signal Heads
A.Do not install signal heads until the system is ready for operation.
B.Use louvered back plates on signal heads as shown. Use a minimum of four 0.12 inch stainless steel screws per section to mount the back plates or according to manufacturer’s instructions.
1.Do not place retroreflective tape on backplates.
3.7 Install Preformed Detector Loops
A.Refer to Section 13591.
B.Refer to AT Series Standard Drawings for detection locations.
3.8 Its Integration, Inspection, Testing, and Acceptance
A.Follow the integration, inspection, testing, and acceptance process according to Section 13595.
Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 1216–1221 of 1,331.