WRONG WAY DETECTION WARNING AND ALERT SYSTEM (WWDWAS)
PART 1 GENERAL
1.1SECTION INCLUDES
A.Wrong Way Detection Warning and Alert System (WWDWAS)
1.2RELATED SECTIONS
A.Section 02056: Embankment, Borrow, and Backfill
B.Section 02890: Retroreflective Sheeting
C.Section 02891: Traffic Signs
D.Section 03055: Portland Cement Concrete
E.Section 03211: Reinforcing Steel and Welded Wire
F.Section 03575: Flowable Fill
G.Section 13554: Polymer Concrete Junction Box
H.Section 13594: Fiber Optic Communication
I.Section 16530: Electrical Power
1.3REFERENCES
A.AASHTO Roadside Design Guide
B.ASTM C 1107: Packaged Dry, Hydraulic-Cement Grout (Nonshrink)
C.ASTM D 3005: Low-Temperature Resistant Vinyl Chloride Plastic
Pressure-Sensitive Electrical Insulating Tape
D.ASTM D 3035: Polyethylene (PE) Plastic Pipe (DR-PR) Based on
Controlled Outside Diameter
E.American National Standards Institute (ANSI)
Wrong Way Detection Warning and Alert System (WWDWAS)
F.National Electrical Code (NEC)
G.National Electrical Manufacturers Association (NEMA)
H.Underwriters Laboratory (UL)
1.4DEFINITIONS Not Used
1.5SUBMITTALS
A.Qualifications for review:
1.Electrical work supervisor
a.Documentation of journeyman or master electrician licensure
b.Documentation of at least three years of experience in traffic
signal construction
2.The Department will notify the Contractor during the guarantee
period of equipment defects and will indicate whether equipment defects need to be repaired or if defective equipment needs to be removed and replaced.
a.Submit detailed plans and procedures of repair work
according to equipment provider’s recommendations for review for equipment defects indicated to be repaired.
b.Repair or remove and replace equipment as indicated within
30 days of notification.
1.6QUALITY CONTROL
A.Qualifications
1.Electrical work supervisor
a.Electrical work must be supervised in person by and under
the responsibility of a journeyman or master electrician licensed in the State of Utah and who has at least three years of experience in traffic signal construction.
PART 2 PRODUCTS
2.1MATERIALS
A.Use electrical components as listed and defined by the NEC.
B.Signs refer to Section 02891 and SN Series Standard Drawings.
C.Retroreflective and non-reflective sheeting refer to Section 02890.
Wrong Way Detection Warning and Alert System (WWDWAS)
2.2STATE FURNISHED MATERIALS
A.Wrong Way Detection Warning and Alert System
1.Luminaire Pole
a.Anchor Bolts
2.Pole Mounted Cabinet
3.R5-1a Sign with LED border
4.Flood Light
5.Radar
6.CCTV Camera
7.Rectangular Rapid Flashing Beacon (RRFB)
8.35Ahr battery
9.Solar panel assembly
10.Associated hardware
2.3WIRING
A.Power Service/Lighting Conductors
1.Refer to Section 16530
2.Stranded copper conductors only
3.Conductors sized per NEC (minimum 10 AWG RHH RHW-2, XLP
USE-2 or approved equivalent)
a.Power Service Conductors
1) Continuous red insulation color for AC load 2) Continuous white insulation color for neutral
b.Lighting conductors (240 Volt unless specified otherwise)
1) Continuous blue insulation color for AC loads 2) Continuous white insulation color for neutral (120/208 Volt only)
B.Bonding/Grounding Cable
1.Size bonding wire according to NEC article 250 (minimum 6 AWG,
copper, solid, bare, soft-drawn)
C.Radar Detection Cable
1.Use manufacturer recommended multi-wire cable for the length of
the installation.
2.Auxiliary Ground Wire: 12 AWG stranded, green insulated, UV
rated.
3.Auxiliary Power Cable: 2-Conductor 14 AWG shielded Loop Home
Run Cable conforming to IMSA 50-2 specification.
a.Do not use power wires (RED and BLACK) from the
manufacturer recommended multi-wire cable.
Wrong Way Detection Warning and Alert System (WWDWAS)
2.4CONDUIT
A.Refer to SL Series Standard Drawings.
B.Meet or exceed all conduit manufacturer’s recommendations for materials
used in the installation of conduits including sweeps, adapters, couplings, glue, plugs, duct seal, and fittings.
C.Conduit and Fittings
1.Minimum schedule 40 PVC rated at 194 degrees F as specified in
NEMA TC-2, NEMA TC-3, ASTM D 3005, UL Listed.
2.High Density Polyethylene (HDPE) SDR11 rated as specified in
ASTM D 3035 with ribbed or smooth interior.
3.Rigid steel as specified in UL-6. Galvanized as specified in ANSI
C80.1.
4.Flexible watertight conduit and fittings as specified.
5.Use only pushlock style coupling for connection of HDPE conduit to
PVC conduit. Glued fittings will not be accepted.
6.Sweeps – factory manufactured sweeps complete with bell and
spigot.
D.Duct Seal - At least 2 inch of duct seal to seal the conduit and allow the
secure fastening of detectable pull tape.
E.Detectable Pull Tape – flat profile, low stretch polyester, detectable,
sequential footage marked, 1,200 lb tensile strength pull tape in each conduit.
F.Backfill
1.Flowable Fill - Refer to Section 03575.
2.Free Draining Granular Backfill Borrow – Refer to Section 02056.
3.Native material – Compact to match existing conditions.
4.Sand
a.Friable natural aggregate, free of loam, detrimental, soluble,
or organic matter
b.3
/8 inch minus, well graded
2.5JUNCTION BOXES
A.Refer to SL Series Standard Drawings
B.Polymer Composite or Polymer Concrete Junction Box – Refer to Section
13554
1.Polymer concrete ring
a.Fused with composite body
b.UV and chemical resistant
Wrong Way Detection Warning and Alert System (WWDWAS)
C.Grout
1.Non-shrink according to ASTM C 1107
2.6POWER SOURCE AND GROUNDING
A.Refer to SL Series Standard Drawings.
B.Refer to Section 16530.
C.Ground Rod Clamps – Acorn with split bolt attachment for each additional
wire.
2.7LUMINAIRE POLE FOUNDATION
A.Foundation Materials
1.Use Class AA(AE) concrete according to Section 03055.
2.Use coated deformed reinforcing steel according to Section 03211.
B.Grout
1.Dry pack
2.Non-shrink according to ASTM C 1107
PART 3 EXECUTION
3.1PREPARATION
A.Coordinate State Furnished Materials
1.Receive materials at the Department’s Central Warehouse, 4501
South 2700 West, Salt Lake City, UT. Contact the warehouse by calling (801) 965-4060 to schedule a pickup, at least 48 hours in advance.
2.Receive drop shipment materials at the prearranged location.
B.Contact local power utility at least 30 days before the connection date.
Verify the exact location, voltage, procedure, and materials required by the local power utility.
3.2UTILITY CONFLICTS AND OBSTRUCTIONS
A.Modify proposed equipment locations to avoid conflict with underground
utilities or other obstructions as required.
1.Obtain approval from the Engineer before modifying locations.
Wrong Way Detection Warning and Alert System (WWDWAS)
B.Coordinate with the Engineer to field-locate new facilities such as cabinet
foundations, camera poles, detector poles, and junction boxes.
C.Field locate equipment with the Engineer:
1.Avoid areas with poor drainage or high potential impact from thrown
snow.
2.Place for maximum accessibility and safety for maintenance
personnel and vehicles, including a bucket truck.
3.Satisfy clear zone requirements as defined in the AASHTO
Roadside Design Guide.
a.Verify right of way limits are not exceeded.
4.Satisfy requirements of applicable Department Standard Drawings.
3.3EXCAVATION
A.Move the excavated material to a location that will minimize obstructions
to pedestrian or vehicular traffic and will not interfere with surface drainage.
B.Protect pedestrian and vehicular traffic from excavation.
C.Remove and properly dispose of surplus excavated material within 48
hours.
D.Do not backfill conduit trenches until inspected by the Engineer.
3.4CONSTRUCT LUMINAIRE POLE FOUNDATION
A.Refer to SL Series Standard Drawings.
B.Do not weld reinforcing steel, anchor bolts, or conduit.
1.Use tie wire to secure conduit.
2.Use template to align and secure drop in anchors.
C.Do not mount steel on foundations until they have been placed for at least
10 days or attained 75 percent of the specified 28-day compressive strength based upon field cured cylinders.
3.5ANCHOR BOLT PRETENSIONING
A.Tighten top nuts, followed by bottom nuts, to a snug-tight condition before
loading.
B.Retighten all nuts to a snug-tight condition after the structure is fully
loaded.
Wrong Way Detection Warning and Alert System (WWDWAS)
C.Pretension anchor bolts by the turn of the nut method by turning the top
nuts 1/3 turn beyond snug-tight condition for anchor bolts ≤ 1 ½ inch diameter, and 1/6 turn beyond the snug-tight condition for anchor bolts > 1 ½ inch diameter.
D.Tighten anchor bolt nuts according to SL Series Standard Drawings for
poles with breakaway slip base systems.
3.6DIRECTIONAL BORING AND TRENCHING FOR CONDUIT
A.Directional Boring
1.Use directional boring for conduit installation on roadway crossings
unless otherwise approved.
B.Trenching Paved Surface
1.Refer to SL Series Standard Drawings.
2.Do not trench through paved surface without approval from the
Engineer.
3.Maximum trench width: 6 inch.
4.Use flowable fill to bottom of pavement or to within 3 inch of the
roadway surface when pavement is less than 3 inch thick.
5.Apply tack coat evenly before final backfill when surface is asphalt.
6.Match the composition, density, and elevation within ± 3/16 inch of
the existing pavement section.
C.Trenching Unpaved Surface
1.Provide sand backfill around conduit and 6 inch above conduit in
trench.
2.Backfill trench above sand to finished grade.
a.Use backfill that matches the composition, density, and
elevation of the existing surface.
D.Install conduits that pass under finished curbs and gutters, sidewalks,
concrete flatwork, textured or decorative surfaces by jacking, drilling, or pushing.
E.Minimum Conduit Cover
1.Refer to SL Series Standard Drawings.
3.7INSTALL CONDUIT
A.Place all conduits in the same trench before surfacing.
B.Use PVC or HDPE conduit underground as shown.
Wrong Way Detection Warning and Alert System (WWDWAS)
C.Seal uncapped conduit ends inside junction box with at least 2 inch of duct
seal.
D.Do not use a torch for bending or shaping PVC conduit.
1.Use equipment specifically designed to heat PVC conduit to shape
required curves or radii.
E.Do not exceed 270 degrees of conduit sweeps between junction boxes.
3.8INSTALL JUNCTION BOX
A.Refer to SL Series Standard Drawings.
B.Provide at least 10-inch spacing between adjacent junction boxes.
3.9INSTALL WIRING
A.Conductors
1.Clean and dry the inside of the conduit before installing conductors
and cables.
2.Install grounding conductor in circuit conduits with 50 V or higher
voltage.
3.Use approved lubricants when pulling conductors and cables in
conduit.
4.Pull conductors and cables with pull tape.
5.Tape the ends of unused conductors and label them as spares.
6.Land wires according to SL Series Standard Drawings.
B.Bonding Conductor (Ground)
1.Run continuously and bond to each metal luminaire pole.
2.Attach one wire around the luminaire pole base bolt with a washer.
Each additional wire will be attached with a split-bolt.
3.Bond the grounding system conductor to the ground rod in each
junction box where 50 V or greater is present.
a.Ground rod clamps (acorns) are required for connecting the
bond/ground wire to the ground rod.
b.Only (1) wire per clamp is allowed. Only (1) clamp per
ground rod is allowed.
c.Combine additional wires using split-bolts.
d.Wire terminal busses of any type are not allowed in signal
related junction boxes or poles.
C.Arrange the wiring neatly within enclosures such as cabinets, junction
boxes, and fixtures.
1.Provide at least 6 ft of slack cable (for all cables) at every junction
box that cable passes through.
Wrong Way Detection Warning and Alert System (WWDWAS)
D.Terminate terminal connections with a mechanical (spade) connector.
E.NEC requires no more than 40 percent of conduit be filled with cables.
Conduit size or quantity may be increased for that specific crossing in cases where more cable is required.
3.10INSTALL POWER SOURCE
A.Refer to Section 16530 and SL Series Standard Drawings.
3.11INSTALL LUMINAIRE
A.Refer to SL Series Standard Drawings.
3.12INSTALL RADAR DETECTION
A.Install, aim, and terminate radar detection 24 hours before WWDAS turn-
on. Contact the Engineer for assistance with detection area locating.
3.13WWDAS TURN-ON
A.Contact the Engineer to schedule the in-progress WWDAS inspection with
the Freeway Operations Maintenance Supervisor at least 7 days before turn-on.
B.Turn-on is not considered complete until ITS fiber optic communications
are functional according to Section 13594.
END OF SECTION
Wrong Way Detection Warning and Alert System (WWDWAS)
Utah revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 828–836 of 1,331.
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