ITEM 632 TRAFFIC SIGNAL EQUIPMENT
632.01
Description
632.02
Contractor Personnel Requirements
632.03
Materials and Equipment
632.04
Certified Drawings
632.05 General
632.06
Vehicular Signal Head, Conventional
632.07
Vehicular Signal Head, Optically Programmed
632.08
Pedestrian Signal Head
632.09
Pedestrian Pushbutton
632.10 Loop
Detector Unit
632.11 Detector
Loop
632.14
Foundations
632.15 Signal
Support
632.16 Strain
Pole
632.17 Wood
Pole
632.18 Down Guy
Assembly
632.19 Pedestal
632.20 Conduit
Riser
632.21 Cable Support
Assembly
632.22
Messenger Wire
632.225 Tether Wire
632.23 Cable
and Wire
632.24 Power
Service
632.25 Covering
of Vehicular and Pedestrian Signal Heads
632.26 Removal
of Traffic Signal Installation
632.27 Reuse of
Traffic Signal Equipment
632.28 Testing
632.29 Method
of Measurement
632.30 Basis of
Payment
632.01 Description. This work consists of furnishing
and installing traffic signal equipment, complete and ready for service.
This work also includes necessary excavation and backfill, disposal of
discarded materials, restoration of disturbed facilities, and surfaces to a
condition equal to that existing before the Work started, and electrical
testing as specified.
Pull
boxes, conduits, ground rods, and cable splicing kits required for traffic
signal equipment installations are specified in Item 625.
632.02 Contractor Personnel Requirements. Conform
to the requirements of Supplement 1063
for the installation or testing of traffic signal equipment.
632.03 Materials and Equipment. Furnish
new materials and equipment of first quality, of current design, and free from
defects.
Use
electrical parts, wire, switches, and other elements of the installations
capable of carrying the required current without excessive heating or drop of
potential.
Ensure
that major items or assemblies of equipment bear a nameplate, indelible
marking, or brand that identifies the type, model, catalog number, and
manufacturer.
Furnish
materials and equipment conforming to:
Concrete, Class QC Misc or QC 1....................... 499,
511
Steel*:
.... Poles, supports,
arms, appurtenances
.... and
anchor bases...................... 730.02,
730.03, 730.04,
......................................................
730.05, 730.06,
730.07,
....................................................................
732.12, 732.11
....
Pedestals............................................................. 732.15
....
Backplates........................................................... 732.22
....
Hardware............................................................ 730.08
.... Stainless steel
hardware...................................... 730.10
Other Items:
.... Conduit,
rigid........................ 725.04, 725.051, 725.052
.... Ground
rod......................................................... 725.16
.... Pull
boxes.................... 725.06, 725.07, 725.08,
725.12
.... Identifying tags or
bands..................................... 725.02
.... Signal
heads................. 732.01, 732.02, 732.03,
732.05
....
Lamps................................................................. 732.04
.... Pushbuttons........................................................
732.06
....
Detectors................................................ 732.07, 732.08
.... Wood
poles......................................................... 732.13
.... Down guys.........................................................
732.14
.... Conduit risers...................................................... 732.16
.... Cable
supports.................................................... 732.17
.... Messenger
wire................................................... 732.18
.... Cable and
wire.................................................... 732.19
.... Power
service...................................................... 732.20
.... Disconnect Switch
with enclosure...................... 732.21
Backplates........................................................... 732.22
.... Tether
Wire....................................................... 732.185
*
Acceptance of materials and products is based on certified test data, furnished
in triplicate, or on test results of samples according 106.04, as required by the Laboratory.
632.04 Certified Drawings. Furnish
certified drawings according to 625.06.
632.05 General. Ensure that major items of traffic signal
control equipment used in combination are compatible, interchangeable and,
whenever feasible, provided by the same manufacturer or supplier. Perform
work in compliance with applicable local laws and codes, the National
Electrical Code, the National
Electrical Safety Code, the Standard
for Electrical Safety in the Workplace and OSHA
Ensure
that the traffic control equipment installed in controller cabinets are shop
prewired according to a wiring diagram that conforms to plan and specification
requirements of the specific project and intersection, and show all wire
harness and field connections required, with abbreviations according to Table 632.05-1. Furnish a neat and legibly drawn
wiring diagram, reproduced on durable paper, and place two copies in a plastic
envelope fastened to the inside of the controller cabinet.
Identify
cable and wire by tags or bands at pull boxes and controller cabinets, with
size, material, and method of marking that conform to 725.02, except ensure that the
identification on the tags or bands conforms to the wiring diagram with
abbreviations according to Table 632.05-1.
The Contractor may identify field wiring using an indelible pen on a plastic
tag instead of embossed letters. Tags shall be a minimum of 1-inch
diameter if round and 1-inch by ½-inch if rectangular. Letters shall be
clearly legible.
Use
spade terminals for wiring connected at signal heads and the wiring connected
at terminal blocks within controller cabinets. However, for incoming
power wiring, use either spade terminals or bared conductor wire connected to
terminal points utilizing screw or spring applied clamping surfaces compatible
with both cooper and aluminum wire and providing a positive grip. Neatly
lash and fasten completed wiring to interiors with clamps and/or ties.
Table
632.05-1 Table and Wire Identification
Cable |
Tag |
Ground |
GND |
Power (2 wire)1Æ 120 volt |
AC +AC- or ACN |
Power (3 wire) 1Æ 120/240 volt |
AC + 1, AC + 2 |
Phase A |
Æ A |
Phase A, pedestrian signal |
Æ A PD |
Overlap, phase A + C |
Æ A + C |
Detector lead-in, phase A |
DET A |
Detector lead-in, phase A (call type) |
DET A CALL |
Detector harness[1] |
DET A |
Interconnect |
IC |
Pre-emption, fire |
PE FIRE |
Pre-emption, railroad |
PE RR |
[1] Place the tag next to
the MS plug at the detector amplifier. |
When
constructing the traffic control system, cooperate with the agency supplying
the electric service. Supply 120/240 volt, single-phase, three-wire
(grounded neutral) power to the disconnect switch.
After
completion of the 10-day performance test in compliance with 632.28 and until acceptance, the Contractor is
responsible for the care and maintenance of traffic control equipment installed
or reused as part of the Contract.
Upon acceptance
of the project, transfer to the Department all manufacturers’ guarantees or
warranties covering installed electrical or mechanical equipment. Furnish
two copies of wiring diagrams, service manuals, and instructions on
installation and maintenance for each different type, model, or system of
equipment used on the project.
632.06 Vehicular Signal Head, Conventional. Furnish
heads in arrangements such that from one to a maximum of five sections
assembled with the specified lens size, color, and circular or arrow
configuration form a specific signal face. Mount signal faces alone as a
one-way head when backplates are used.
Furnish
multi-way heads with top and bottom brackets for mounting purposes. Fit
faces of lesser height in multi-way heads with pipe spacers. Close
openings unused for mounting purposes with weatherproof caps.
Install signals in a plumb
condition, using a balance adjuster only if approved by the engineer. Fit
heads mounted on mast arms, except those intended to be rigidly mounted, with a
universal hanger allowing the head to swing in both longitudinal and transverse
directions. Use drop pipes/extenders of suitable length only when
necessary to bring the bottom of the signal heads to a proper roadway
clearance. Drop pipes/extenders shall be kept as short as necessary on backplated signals. Use of drop pipes/extenders greater
than 1.5 feet in length must be approved by the Engineer. Use
disconnect hangers for suspended heads only when specified.
Orient each
signal face to its traffic approach, and lock faces in place by the serrated or
other type device incorporated in signal housing and support hardware.
Install LED
lamps in each section.
Furnish backplates unless specified otherwise.
632.07 Vehicular Signal Head, Optically Programmed. Furnish
heads of this type consisting totally of optically programmed sections unless an intermix of optically programmed and conventional
sections is specified. Install approved LED light sources or lamps in
each optically programmed section.
Program
each signal section according to the plan requirements. Upon completion of the
project, deliver all programming tools and devices to the maintaining agency.
Furnish
backplates unless specified otherwise.
632.08 Pedestrian Signal Head. Furnish
heads with the type of light source and symbol height specified. Orient
each signal head to its crosswalk, and lock heads in place by the serrated or
other type device incorporated in signal housing and support hardware.
Close openings unused for mounting purposes with weatherproof caps.
632.09 Pedestrian Pushbutton. Properly
orient and install pushbuttons on poles or pedestals. Service pushbuttons
mounted on steel poles by wiring inside the poles. Furnish 3/4-inch (19
mm) diameter holes through the back of the housing and the pole wall, install a
rubber grommet, and route wiring through until no external wiring is
visible. Plug any unused conduit attachment holes. Attach the
housing by machine or self-tapping screws in the housing back wall.
Service pushbutton mounted on wooden poles through conduit. Furnish
pedestrian pushbutton signs of the legend and size required.
632.10 Loop Detector Unit. Install
and tune detector units to their loops with the sensitivity set for optimum
operation and any interference or cross talk eliminated between other detector
units in the cabinet. Perform a field check to ensure that no extraneous
detections are occurring by observing each detector unit’s operation to
determine that a signal occurs only when a vehicle enters its associated
loop. If actuations are observed when there is no vehicle in the loop,
eliminate the extraneous detections.
632.11 Detector Loop. Saw slots in the pavement
for installation of vehicle detector loop wire in the configuration,
dimensions, and combinations required. Cut an extension from the loop to
the pavement edge to allow wire routing to an adjacent pull box.
Furnish
slots 1/16 to 1/8-inch (1.6 to 3 mm) wider than the outside diameter of the
loop wire or tubing. Ensure that the slot depth provides a covering of
not less than 3/4-inch (19 mm) above the uppermost detector wire tubing after
the loop installation is completed. Before installing loop detector wire,
brush and blow all slots clean of loose material and completely dry.
Install loop detector wire according to 632.23.
Conform to all applicable state and local nuisance dust regulations while saw
cutting.
Fill
the slots completely with a flexible embedding sealant, listed on the ODOT
QPL. Do not disturb slots until sealant has
cured. Cured sealant shall be level with or higher than the pavement
surface.
For
loop detector wire installations in new asphalt, the Contractor may saw slots
and embed sealant in a subsurface course with subsequent covering by the
surface course, subject to the Engineer’s approval.
632.14 Foundations. Locate support
foundations, and stake with the proper elevation. If
underground or overhead obstacles are encountered during stakeout, or to
correct slope and subsurface difficulties, change foundation location and
orientation with the approval of the Engineer. Ensure that the
approved location provides a safe clearance from overhead power lines for
construction operations, in compliance with applicable Codes. The Contractor
is responsible for the correct location, elevation, and orientation for all
poles and pedestals installed on the foundations.
Excavate
for foundations using an earth auger to specified dimensions according to 503.04. Exercise caution when
excavating in areas of underground installations to avoid their disturbance or
damage. When a cave-in occurs, excavate using casing, sleeving,
or other methods, with the Engineer’s approval. If subsurface obstructions
are encountered, remove the obstructions, or replace the excavated material and
relocate the foundation, with the Engineer’s approval. If bedrock is
encountered, the Contractor may reduce that portion of the specified foundation
depth within the bedrock up to 50 percent. Perform all necessary
dewatering of the excavation.
Perform
foundation concrete work according to Item 511, except that the loading
restrictions in 511.14 are modified by
this subsection. Place the concrete against undisturbed soil or compacted
embankment. Form the top of the foundations to a nominal depth of 6
inches (150 mm) below the groundline. Place the concrete foundation, including formed top, in one
continuous concrete pour.
For
foundations for anchor base type supports, provide the required reinforcing
rods, and have anchor bolts and conduit ells accurately held by a template.
Remove forms and templates once the
concrete has hardened sufficiently so as not to be susceptible to damage. After 14
days, erect and load supports on anchor base foundations. The Contractor
may erect and load supports after 7 days if the tests of two beam specimens of
concrete yield an average modulus of rupture of not less than 650 pounds
per square inch (4.5 MPa).
632.15 Signal Support. Furnish supports with mast
arms with the required pole and arm length, anchor bolt circle diameter, and
anchor bolt size.
Ensure
that the combination signal supports with light pole extension provide for the
attachment of a luminaire bracket arm.
For
support designs not specifically shown on the plans, demonstrate, to the
Director’s satisfaction, that supports are structurally equivalent to the
specified design.
Do
not use concrete grouting in the space between the foundation surface and
support base.
Conform
to the requirements of 630.06 for threaded fasteners, anchor bolts, anchor bolt
nuts, and anaerobic adhesive. Anaerobic adhesive is not required at the
mast arm attachment.
Do
not erect signal supports unless at least one signal, sign or damping device
approved by the Engineer is installed within 24 hours.
632.16 Strain Pole. Furnish strain poles for
the attachment of messenger wire with the required pole length. Use
anchor base type strain poles. Adjust anchor base type poles with the initial
rake so that when loaded the poles assume an essentially vertical position.
Ensure
that the combination strain poles with light pole extension provide for the
attachment of a luminaire bracket arm.
Conform
to the requirements of 630.06 for threaded fasteners, anchor bolts, anchor bolt
nuts, and anaerobic adhesive.
632.17 Wood Pole. Set wood poles in holes excavated
by an earth auger to a minimum depth of 6 feet (1.8 m). Use an auger with
a diameter approximately 4 inches (100 mm) greater than the pole butt.
Hold poles with initial rake, up to a maximum of 12 inches (0.3 m), while
tamping backfill into place, so that under messenger wire tensioning conforming
to 632.22, the poles assume an essentially
vertical position. Furnish backfill material no greater than 1 inch (25
mm) in size, and thoroughly tamp material in lifts not exceeding 6 inches (150
mm), to the satisfaction of the Engineer. If concrete embedment is
specified, brace the poles until the concrete has set.
Liberally
coat field holes bored for the attachment of messenger or guy wire with
approved creosote base paint and fitted with 5/8-inch (16 mm) thimble-eye
through-bolts and 3-inch (75 mm) washers. Securely attach and protect
ground wire furnished as part of another work item with a wood or plastic
molding for a minimum distance of 10 feet (3 m) above groundline.
632.18 Down Guy Assembly. Install
and tension guy assemblies before erecting signals such that they will resist
the major portion of the horizontal loading caused by loading of the messenger
wire.
632.19 Pedestal. Furnish pedestals for the support
of traffic control equipment with a cast or plate steel base, unless a
transformer type base is specified.
632.20 Conduit Riser. Attach risers to poles to
provide a wiring raceway and include a weatherhead,
conduit, necessary fittings, and pole attached clamps. Attach risers to
poles by clamps spaced at intervals not exceeding 5 feet (1.5 m). Paint
conduit risers mounted on painted poles to match the poles.
632.21 Cable Support Assembly. Use cable
support assemblies to eliminate strain on cables, or groups of cables up to a
maximum of four, entering the interior of poles through a weatherhead
or mast arm. If required, include a length of messenger wire forming a
sling with ends formed of lapped wire, thimbles, and clamps as part of the
assembly.
632.22 Messenger Wire. Arrange messenger wire
with accessories between two or more poles to provide support and attachment
for traffic control equipment. Accessories used with messenger wire
include bullrings, thimbles, preformed guy grip dead ends, and three bolt
clamps. Furnish bullrings at messenger wire network corners. Use
thimbles to attach messenger wire to the shackles of strain pole clamps and
bullrings.
Adjust
the length of the messenger wire under the load of traffic control equipment so
the sag at the lowest point is not greater than 5 percent or less than 3
percent of the span. Attach signal cable to messenger wire with lengths
of preformed helical lashing rod that are of a proper internal diameter to
tightly secure the cable to the messenger wire. Attach interconnect cable
with preformed lashing rod or spinning wire.
632.225
Tether Wire.
Arrange tether wire with accessories to stabilize signal heads and prevent
excessive swinging and twisting. Install shim washers on hanger pin adjacent to
wire entry to prevent any twisting of the head on the hanger. Accessories
included with tether wire shall be those shown in the appropriate Plan Insert
Sheet or Standard Construction Drawing and include pole clamps, anchor
shackles, S-hooks yielding element, thimbles, turnbuckles, guy grips, wire rope
clips, backup ties, lock wire, safety tie wires, and signal head tether anchors
and extenders.
Adjust
the tether span to be horizontal on simple spans. On all spans, install tether
horizontally and tighten with turnbuckles. Bull Rings will be used at all
internal corners of the tether span. Safety ties shall be installed at all
yielding (S-hook) locations to prevent the span end from dropping into the
roadway if the S-hook opens. No electrical or communication cables of any kind
shall be attached to the tether wire. No signs or other devices shall be
suspended from or attached to the tether wire. Turnbuckles shall be
tightened by hand to achieve the tether wire tension shown in appropriate Plan
Insert Sheet or Standard Construction Drawing. Measure tether tension
with Loos
& Co., Inc. Model PT-2 or approved equal. Record
tension test results and present written copy to the Engineer.
632.23
Cable
and Wire.
Fashion cable at traffic signal equipment weatherhead
entrance fittings into a drip loop that extends at least 6 inches (150 mm)
below the entrance. Do not allow the cable to chafe on the
equipment. Support cables installed in strain poles and signal supports
with cable support assemblies according to 632.21.
Do
not use splices in any cable or wire, except at the following locations:
A.
At the junction of detector wire and lead-in cable.
B.
At the junction of power cable and the power supply source or service cable.
C.
On long lengths of interconnect or service cable.
For
splices allowed in aerial installations, accomplish splicing in weather tight
splice enclosures. For splices allowed in underground installations,
accomplish splicing in pull boxes or poles where the splice is encapsulated
with poured waterproof epoxy insulation according to 725.15.
Install
signal cable between signal heads and controller cabinets. Signal cables shall
not be stripped beyond a length necessary to attach individual conductors
within the signal head . The jacket shall extend into
the signal head enclosure. Install interconnect cable between controller
cabinets of different intersections. Route signal and interconnect cable by
aerial installation supported by messenger wire or within underground conduit.
If specified, use aerial self-supporting integral messenger type
interconnect cable with a figure “8” cross-section and include pole
clamps and splice enclosures. Ground the supporting messenger
wire of interconnect cable.
Provide
loop detector wire consisting of detector wire inserted into flexible plastic
tubing. Ensure that the tubing encases the wire continuously from the
splice at the lead-in cable, through the entire loop turns, and back to the
splice. Install loop detector wire in sawn roadway slots forming loops
according to 632.11. Furnish the required
number of turns of wire installed for each loop, and push the wire carefully
into the slots with a blunt tool to avoid damaging the tubing. Run the
wire continuously around the loop perimeter and through a slot leading to the
pavement edge and by underground conduit to a roadside pull box or pole with 5
feet (1.5 m) at each end for slack and splice. Uniformly twist wires and
tubing installed in the conduit to the splice with lead-in cable at 3 to 5
turns per foot (10 to 16 turns per meter). Splice the loop ends to
lead-in cable, which is connected to the controller cabinet. Join the
wires by a mutually twisted in-line splice, rosin core soldered, and wrapped in
vinyl or equivalent electrical tape, and encapsulate wires with an approved
poured waterproof epoxy insulated splice according to 725.15. Extend and seal the tubing
ends into the poured epoxy splice. Also, solder crimped terminals to the
conductors and the shield for connections inside the cabinet.
Install
power cable from the power supply source to the controller cabinet. If
multi-conductor power cable is specified, the Contractor may substitute
multiple single conductors.
Install
service cable aerially from a remote power source to the vicinity of the
controller cabinet with the support cable functioning as the electrical
neutral. Furnish connections used with aluminum power or service cable of
an approved type for aluminum to aluminum or aluminum to copper connections, and
insulate connections with an approved vinyl mastic pad.
632.24 Power Service. Furnish and install all
equipment necessary to provide complete electrical service to each signal
installation as shown on the plans. Make all necessary arrangements with
the local electrical power company for connections to establish electrical
service. Charges made by the power company for establishing of the
account, extension of company facilities, connection of customer equipment to
the power company facilities and energy will be borne by the maintaining
agency.
Power
service consists of equipment to provide a pole attached wiring raceway and
disconnect switch for use with power cable routed from the service entrance to
the controller cabinet. The power service installation includes a weatherhead, conduit and fittings, a disconnect switch with
enclosure, meter base and attachment clamps.
Bend the conduit
away from the pole at the top and bottom of the riser to allow the conduit to
enter straight into the enclosure or meter base hub, and to provide space for
the weatherhead when the riser is pulled tight
against the pole. Furnish watertight conduit connections between the
meter base and enclosure by using conduit hubs listed on the enclosure UL
label.
Paint conduit
risers mounted on painted poles to match the poles.
632.25 Covering of Vehicular and Pedestrian Signal Heads. Cover
vehicular signal heads if erected at intersections where traffic is maintained
before energizing the signals. Cover pedestrian signal heads when
specified in the plans. Use a sturdy opaque covering material
specifically made for use with traffic signals, and ensure that the color of
the cover is different than the signal head, tan or beige, so that it is clear
to drivers and pedestrians the heads are covered, not dark, Use a method of
covering and cover attachment and materials as approved by the Engineer. Covers
are to be free of text, pictures, or any type of advertising. . Maintain
covers, and remove them when directed by the Engineer.
632.26 Removal of Traffic Signal Installation. Remove
signal heads, cable, messenger wire, strain poles, cabinet, controller, or
other incidental items required by the Engineer. Remove support
foundations to at least 1-foot (0.3 m) below subgrade or finished groundline. Backfill, restore surfaces, and dispose
of surplus material according to 105.16, 105.17 and 611.15.
Store removed items on the project for salvage by the maintaining agency, or
reuse removed items as part of a new installation on the project under another
item of work. Dispose of all items not designated for salvage or
reuse. As specified in 614.03, do not
remove signals until a new signal system or a temporary traffic control method
approved by the Engineer is in operation. Suitably protect stored
equipment.
632.27 Reuse of Traffic Signal Equipment. Reinstall
or re-erect specified traffic equipment, removed from existing signal
installations within the project. Clean and restore reused equipment to
an operating condition, and relamp signals with the
proper type and size lamp. Furnish all additional hardware and
incidentals necessary to allow reuse of the equipment.
A. General. Furnish all personnel and equipment required to
successfully perform the following tests, and furnish to the Engineer six
certified copies of complete test records, test reporting forms supplied by the
Engineer, or alternate certification approved by the Engineer.
B. Ground Test. Measure each ground rod for earth resistance according
to 625.19, except that measurements are not
necessary immediately after installation.
C. Short-Circuit Test. Before performing any cable insulation tests or
performance test, perform a short-circuit test with a volt-ohmmeter or other
approved instrument. Conduct short-circuit tests
with electrical loads, power sources, equipment grounds, and earth grounds
disconnected. Test signal cable routed to signal heads with connections
made to lamp sockets without lamps installed. Measure each conductor
against every other conductor and ground to ensure that no short-circuits,
cross-circuits, or other improper connections exist. Ensure that
continuity does not exist between any conductor and another conductor including
ground.
D. Circuit Continuity Test. Temporarily jumper each circuit branch at its
termination and the temporarily looped circuit measured for continuity to
ensure that no open circuits exist, that the circuit branch is according to
plan, that no high resistance connections exist, and that each circuit is
properly identified. Test the lead-in cable for loop detector wire before
and after splicing the cable to the loop wire. As an alternative, perform
the circuit continuity testing of signal head cable by applying 120 volts to
each outgoing circuit and observing that only the proper lamps are lighted.
E. Cable Insulation Test. Ensure that the insulation resistance measured
to ground is not less than 10 megohms for each
conductor of cable or wire terminating at the controller cabinet. Perform
insulation testing with all conductors disconnected from their points on the
terminal blocks. Measure insulation resistance for the wire of roadway
loops after the embedding of the wire with sealant in slots. Include a
list of the resistance readings for each conductor in the test results.
After completing the cable insulation test, connect all cabinet wiring
according to the wiring diagram. Demonstrate to the satisfaction of the
Engineer that all circuits are continuous and operating correctly with freedom
from shorts, crosses, and unintentional grounds.
F. Functional Test. Before the 10-day performance test
begins, make the following checks and demonstrate to the Engineer that the
system is ready for the performance test. Ensure that the incoming AC
voltage is a nominal 120 volts. If the supplied voltage under load is
less than 100 or more than 130 VAC, contact the power
company to arrange correction. Ensure that the cabinet ventilating fan,
fan thermostat, and convenience outlet with lamp is operational. Verify
correct timing settings on the controller as shown on the plans. Check
all cabinet switches including the power on/off switch and flash switch.
Check all controller functions to verify correct operation. Check the
detector units to determine which pavement loop is associated with which
detector unit. Check the visual call strength indication of detector
units to determine that each vehicle class (truck, car, motorcycle, and
bicycle) entering sensor areas is detected on the
associated detector unit and that no extraneous calls occur when the sensor
area is vacant. Occasional extraneous calls may be permitted by the
Engineer if necessary to assure detection of small vehicle targets (bicycles
and motorcycles). Check the flash switch to verify transfer of signal
operation to flash and return to stop-and-go. Check the conflict monitor
to verify that it is not activated by normal signal operations or by the
manipulation of cabinet switches. If the monitor is activated, determine
the cause of the problem and make appropriate changes and adjustments before
beginning the performance test. Test the conflict monitor by artificially
causing a number of different conflicting indications, and verify that at each
test the monitor causes the signals to begin flashing and places the controller
in a “stop timing” mode. Obtain artificial causation either by touching a
jumper wire between two conflicting load switch outputs or by other methods
approved by the Engineer. Ensure that the signal flashes when the monitor
is disconnected.
G. Performance Test. At least 7 days before the performance test begins,
notify the Engineer of the starting date. The Engineer will notify the
maintaining agency. Before acceptance, operate the traffic control system
continuously for 10 consecutive days without major malfunction or
failure. Immediately replace or repair minor failures (such as lamps, a
single detector unit, or an individual signal head, etc.) that do not cause
restart of the test. Major malfunctions or failures (such as a master or
local controller, interconnect equipment, etc.) will cause termination of the
test and, after replacement or repair, the beginning of a new 10-day
test. Monitor items that have been repaired or that are replacements for
a 10-day period to provide assurance of their reliability. Record, for inclusion in the test result, the method and date of
correction of each fault, and the beginning and end of the test.
632.29 Method of Measurement. The
Department will measure Vehicular Signal Head and Pedestrian Signal Head by the
number of complete units, and will include all support or mounting hardware,
disconnect hangers, closure caps, dimmers, and lamps as required.
Optically programmed heads shall include programming. For programming
purposes, 8-inch (200 mm) programmed heads shall include one extender tool per
project.
The Department
will measure Pedestrian Pushbutton by the number of individual units, and will
include pedestrian pushbutton signs.
The Department
will measure Loop Detector Unit by the number of individual units, adjusted and
tuned, and will include a wiring harness. If multi-channel detector units
are used, the Department will consider each channel as an individual detector
unit up to the number of units specified.
The Department
will measure tether wire by the number of feet (meters) in place, and will
include all necessary accessories such as pole clamps, safety tie clamps,
anchor shackles, S-hooks yielding element, thimbles, turnbuckles, guy grips,
wire rope clips, lock wire, safety tie wire, lead sheet, and signal head tether
anchors and extenders in accordance with the applicable Plan Insert Sheet or
Standard Construction Drawing. The Department will measure from pole center to
pole center, or pole center to bullring, or bullring
to bullring. The Department will not measure any length of tether wire for
attachment to poles or bullrings by bending, lapping or wrapping.
The Department
will measure Detector Loop by the number of complete
detector loops installed in the pavement, and will include pavement cutting,
loop detector wire with tubing in place, application of sealant, conduit,
trenching, backfilling, and surface restoration from the edge of pavement to
the pull box.
The Department will
measure Strain Pole Foundation, Signal Support Foundation, and Pedestal
Foundation by the number of complete units, and will include excavation,
dewatering, sleeving, casing, reinforcing steel,
concrete, backfilling, disposal of surplus excavation, and installation only of
anchor bolts and conduit ells.
The Department
will measure Signal Support, Combination Signal Support, Strain Pole,
Combination Strain Pole, Wood Pole, and Pedestal by the number of complete
units of each, and will include pole arms, weather-heads and blind half
couplings, anchor bolts and conduit ells furnished for foundations.
The Department
will measure Down Guy by the number of individual units, and will include
messenger wire, pole clamp or thru-bolt, washer, clamps, guy grips, insulator,
guy guard, and anchor.
The Department
will measure Conduit Riser by the number of complete units, and will include weatherhead, conduit, fittings, clamps, and hardware.
The Department
will measure Messenger Wire by the number of feet (meters) in place, and will
include all necessary accessories such as, grips, thimbles, clamps, bullrings,
and lashing rod. The Department will measure from pole center to pole center, or pole center to bullring, or bullring to
bullring. The Department will not measure any length of messenger wire
for attachment to poles, or bullrings by bending, lapping, or wrapping.
The
Department will measure Signal Cable, Interconnect Cable, Loop Detector Lead-In
Cable, Power Cable, and Service Cable by the number of feet (meters) in
place. Cable inside of poles shall include cable support
assemblies. Aerial cable shall include pole attachment hardware, splices,
splice enclosures, and ground connection. Lead-in cable shall include
poured epoxy insulated splices. The Department will measure: (1)
horizontally from center-to-center of pull boxes, poles, cabinets, power
sources, and signal heads with an additional allowance of 5 feet (1.5 m) at
each pull box and terminating points for slack and connections; and (2)
vertically between pole or conduit outlets. If single-conductor power
cable is substituted for multi-conductor cable, the Department will measure
required length of multi-conductor cable.
The
Department will measure Power Service by the number of complete units, and will
include weatherhead, conduit, fittings, clamps and
other necessary hardware, installation of meter base, ground wire connection,
and disconnect switch with enclosure.
The
Department will measure Covering of Vehicular Signal Head and Covering of
Pedestrian Signal Head by the number of individual signal heads covered, and
will include materials and labor to erect, maintain, and remove the covering.
The
Department will measure Removal of Traffic Signal Installation by the number of
installations removed, and will include storage when required.
The
Department will measure Removal of (Item) and (Storage or Reerection) by the number of specific traffic signal
installation parts (such as a signal head, controller unit, or pole) removed,
and will include storage when required.
The
Department will measure Reuse of (Item) by the number of traffic signal
equipment items reused, and will include cleaning, restoring, and relamping.
632.30 Basis of Payment. The costs
to arrange service by the supply agency are included under Power Cable.
The
costs of personnel, materials, equipment, electrical energy, and incidentals
required to conduct performance tests are included under the contract unit
price for the respective items tested.
The
Department will pay for accepted quantities at the contract prices as follows:
Item
Unit
Description
632
Each
Vehicular Signal Head, (Yellow or
Black), ___-Section ___ inch
(___ mm) Lens ___-Way (with Backplate)
632
Each
Vehicular Signal Head,
Optically Programmed, (Yellow or Black)
___-Section, ___ inch
(___ mm) Lens, ___-Way (with Backplate)
632
Each
Pedestrian Signal Head,
(Countdown), Type ___
632
Each
Pedestrian Pushbutton
632
Each
Loop Detector Unit
632
Each
Detector Loop
632
Each
Strain Pole Foundation
632
Each
Signal Support Foundation
632
Each
Pedestal Foundation
632
Each
Signal Support, Type TC-___, Design ___
632
Each
Combination Signal
Support, Type TC-___, Design ___
632
Each
Strain Pole, Type TC-___, Design ___
632
Each
Combination Strain Pole,
Type TC-___, Design ___
632
Each
Wood Pole, Class ___,
(Length)___ feet (___ m)
632
Each
Down Guy
632
Each
Pedestal, (Length) ___ feet (___ m)
632
Each
Pedestal, (Length) ___ feet
(___m),Transformer Base
632
Each
Conduit Riser, ___ inch (___ mm) Dia.
632
Foot
(Meter)
Messenger Wire, (No.)
Strand
___ inch (___ mm)
Dia., with Accessories
632
Foot
(Meter)
Signal Cable, ___- Conductor, ___ AWG
632
Foot
(Meter)
Interconnect Cable, ___-
Conductor, ___ AWG
632
Foot
(Meter)
Interconnect Cable, Integral Messenger Wire
Type, ___-Conductor, ___ AWG
632
Foot
(Meter)
Loop Detector Lead-In Cable
632
Foot
(Meter)
Power Cable, ___- Conductor, ___ AWG
632
Foot
(Meter)
Service Cable, ___-
Conductor, ___ AWG
632
Each
Power Service
632
Each
Covering of Vehicular Signal Head
632
Each
Covering of Pedestrian Signal Head
632
Each
Removal of Traffic Signal Installation
632
Each
Removal of (Item) and
(Storage Or Reerection)
632
Each
Reuse of (Item)
632
Foot
(Meter)
Tether Wire, with Accessories