2-CIZ25-TRN-3193 - Specifications - Section B.pdf

SECTION B

CITY OF DALLAS

SIGNAL

SPECIFICATIONS

CITY OF DALLAS

DEPARTMENT OF TRANSPORTATION

TRANSPORTATION OPERATIONS DIVISION

City of Dallas, Department of Transportation, Traffic Signals Page 1 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

2020 General Traffic Signal Construction Specifications General Notes

1. All work performed shall be performed in accordance with:

a. The Plans,

b. All specifications included and/or referenced herein,

c. The City of Dallas’ Department of Public Works Paving Design Manual,

d. The City of Dallas’ Department of Public Works Standard Construction Details (File 251‐D),

e. the latest edition of the North Central Texas Council of Governments’ Standard Specifications for Public Works Construction, including the latest edition of the City of Dallas Department of Public Works and Transportation’s Addendum to such,

f. Applicable sections of the National Electrical Code (NEC) and/or National Electrical Safety Code (NESC),

g. any and all federal, state, and local ordinances, regulations, and/or requirements

2. When referenced, “TxDOT Standard Specifications” shall refer to the 2014 or later edition of the Texas Department of Transportation Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges.

3. The following Texas Department of Transportation (TxDOT) Standard Drawings are hereby incorporated as the governing TxDOT Standards under this contract:

SMA(1‐2)‐12 (DAL) SINGLE MAST ARM ASSEMBLY

DMA(1‐3)‐12 (DAL) DUAL MAST ARM ASSEMBLY

LMA(1‐5)‐12 (DAL) LONG MAST ARM ASSEMBLY

MA‐C‐12 MAST ARM CONNECTIONS

MA‐D‐12 (DAL) MAST ARM POLE DETAILS

LUM‐A‐12 LUMINAIRE SUPPORT STRUCTURES

CFA‐12 CLAMP‐ON FITTING ASSEMBLY FOR LUMINAIRE ARM

TS‐FD‐12 TRAFFIC SIGNAL POLE FOUNDATION

TS‐BP‐20 TRAFFIC SIGNAL HEAD WITH BACKPLATE

SP‐80(1,2)‐12 (DAL) STRAIN POLE ASSEMBLIES

SMD(SLIP ‐1)‐08 (DAL) SIGN MOUNTING DETAILS, SMALL ROADSIDE SIGNS

ED(1)‐14 ELECTRICAL DETAILS ‐ CONDUIT

ED(3)‐14 ELECTRICAL DETAILS ‐ CONDUCTORS

ED(4)‐14 ELECTRICAL DETAILS ‐ GROUND BOXES

ED(5)‐14 ELECTRICAL DETAILS ‐ SERVICE SCHEMATICS

ED(6)‐14 ELECTRICAL DETAILS ‐ SERVICE ENCLOSURE & NOTES

ED(7)‐14 ELECTRICAL DETAILS ‐ SERVICE SUPPORT TYPES SF & SP

City of Dallas, Department of Transportation, Traffic Signals Page 2 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

ED(8)‐14 ELECTRICAL DETAILS ‐ TYP TRAFFIC SIGNAL SYS DETAILS

ED(9)‐14 ELECTRICAL DETAILS ‐ ELEC SERVICE TYPE PS

ED(10)‐14 ELECTRICAL DETAILS ‐ ELEC SERVICE TYPE GC, OC & TP

ED(11)‐14 ELECTRICAL DETAILS – DUCT CABLE / HDPE CONDUIT

ED(12)‐14 ELECTRICAL DETAILS ‐ GROUND BOX (BATTERY BOX)

ITS (6)‐15 ITS POLE EQUIPMENT MOUNTING DETAILS

ITS (41)‐16 ITS GROUND BOX POLYMER CONCRETE

RVDS‐18 RADAR VEHICLE DETECTION SYSTEM

DALLAS DISTRICT STANDARD CONSTRUCTION DETAILS FOR SPAN WIRE MOUNTED TRAFFIC SIGNALS (3 SHEETS)

PRD‐13 PEDESTRIAN HANDRAIL DETAILS

CCCG‐12 CONCRETE CURB & GUTTER

SS8835 ACCESSIBLE PEDESTRIAN SIGNAL UNITS

SS6007 INTELLIGENT TRANSPORTATION SYSTEM (ITS) FIBER OPTIC CABLE

4. For all work within the City Right‐of‐Way, the Vendor shall be required to register with and submit traffic control plans for review and approval complete the application for a ROW permit using the City of Dallas online system at the following URL: www.rowmanagement.dallascityhall.com Contractor must have a copy of the ROW permit on site when actively working in the City ROW.

5. All workmanship shall be first class, and finished work shall be neat and uncluttered in appearance.

6. The Vendor shall schedule their work so as to cause the minimum interference with traffic and the operation of the existing signal system. Existing signals may be shut down for modification and/or equipment installation only with the approval of the Engineer.

7. The Vendor will be responsible for providing and installing miscellaneous minor hardware items such as nuts, bolts, electrical tape, etc., that are necessary for the proper installation and operation of individual bid items for the project. The cost of providing and installing this hardware will be considered incidental. In addition, the cost of reconnecting or reassigning existing signal cables will be considered incidental.

8. The Vendor’s responsibility for correction of any substandard workmanship and/or materials shall extend for a period of twelve months from the date of final completion for the applicable location.

9. Written approval shall be obtained from the Engineer should the Vendor desire to deviate from any of the standards or specifications included herein. A written request shall be submitted to the Engineer including a description of the change, sample(s) or cut sheet(s) of the substitute materials and/or equipment, or engineering drawings as deemed necessary by the Engineer.

10. The locations of the various items shown on the construction plans are approximate. The Vendor shall give the Engineer 48 hours notice of their intention to establish the final location of the various items as described herein. Such locations shall be approved on the ground by the Engineer. Failure to contact the Engineer and obtain their approval for the location of these items may result in their rejection, non‐payment by the City and removal of the unapproved items by the Vendor at their expense. It shall be the Vendor’s responsibility to locate all utilities prior to any excavation work being

City of Dallas, Department of Transportation, Traffic Signals Page 3 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications performed. If utilities shall be relocated in order for construction to proceed, then it will be the Vendor’s responsibility to coordinate this work. If damage to utilities occurs as a result of any construction performed by the Vendor, it shall be the Vendor’s responsibility to effect and pay for the repairs.

11. If more than one unit of a given bid item is required, then the Vendor shall ensure that all units of the product are from one manufacturer, unless otherwise approved by the Engineer.

12. All materials furnished by the Vendor shall become the property of the City effective from the date of final acceptance of the applicable work order. The Vendor shall have full responsibility for all materials with respect to damage, theft, or loss until the date of final acceptance of the work for the applicable work order.

13. The Vendor is responsible for the safe transport and storing of materials furnished by the City. Such materials become the responsibility of the contractor until the date of final acceptance of the work for each applicable work order. The Vendor bears the risk of loss or damage to such materials while in their possession prior to completion of the work for the applicable work order.

14. The Vendor agrees to reimburse the City for replacement of any materials furnished by the City that are lost, damaged or destroyed at their sole cost. The Vendor agrees to defend, indemnify, and hold harmless the City, its officers, agents, and employees, from any and all claims, judgments, lawsuits, fines, penalties, liens, costs, and other damages, whether suffered by third persons or by the Vendor, arising out of the transportation, storage, installation, or use of the City’s material during performance of the work. The City will not be responsible for storage rental charges of any kind, and no lien shall be attached to the materials as a result of Vendor’s failure to pay rental charges or other charges. The Vendor agrees to prevent liens and encumbrances of any nature from attaching to the material while it is in their possession.

15. Materials furnished by the City are, and remain at all times, the property of the City. The Vendor shall ensure that such materials are kept and stored separately from the Vendor’s property or other property, and shall advise others by labeling or other measures that the materials are the City’s property solely for use in the performance of the particular work. The City may require return of any materials hereunder, or refuse to furnish further materials in the event of failure to abide by these provisions.

16. While performing work under the project, the Vendor bears the sole risk of loss for damages to or destruction of any traffic signal equipment or appurtenances, on equipment that was not to be replaced or installed under project, but which was damaged or destroyed through the fault or negligent act of the Vendor. The Vendor shall replace such damaged or destroyed equipment, etc., at no cost to the City.

17. The Vendor shall assume full responsibility for the preservation of existing landscaping (e.g. sod, shrubbery, trees, etc.), sprinkler systems, and any other private property either on or off the ROW at the job site during the installation of items included in the project. Damaged landscaping, sprinkler systems, and other private property shall be replaced within a reasonable time by the Vendor at their own expense to the satisfaction of the Engineer.

18. No trees or shrubbery shall be cut except upon the specific authority of the Engineer.

19. Removal of mail boxes in the way of construction requires 48 hours advance notice to the Engineer. A temporary mailbox shall be provided at a location determined by the Engineer. The cost of removal of mailboxes and installation of temporary mailboxes shall be incidental to the items provided.

20. The Vendor shall secure permission from the proper authority and the approval of the Engineer before cutting into or removing any pavement, walks, curbs, or ramps which might be required during construction.

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21. After work is completed, the Vendor shall restore any curbs or walks which have been damaged or removed to a condition equal to or better than the original condition and to the satisfaction of the Engineer.

22. Initial testing of all materials, construction items, or products incorporated in the work will be performed at the direction of the City and at the expense of the Vendor.

23. In the event that a material, construction item, product incorporated in the work fails to satisfy the minimum requirements of the initial test(s) described, appropriate prove‐out tests shall be made as directed by the Engineer to determine the extent of the failure and to verify that corrective measures have been made to bring the item up to specification requirements. The cost of all testing necessary to determine the extent of the failure and the adequacy of the corrective measures shall be the responsibility of the Vendor.

24. The Vendor shall comply with all the requirements of the latest editions of the Texas Manual on Uniform Traffic Control Devices, the Texas Department of Transportation Temporary Traffic Control Design Standards, the City of Dallas’ Traffic Barricade Manual, and Exhibit “A” referenced in this document, respectively.

25. The Vendor shall provide and maintain all warning devices and take all precautionary measures required by law to protect persons and property while said persons or property are approaching, leaving, or within the work site or any area adjacent to said work site. No separate compensation will be paid to the Vendor for the installation or maintenance of any warning devices, barricades, lights, signs, or any other precautionary measures required by law for the protection of persons or property, including off duty police officers.

26. The Vendor shall be held responsible for all damages to work items and other public or private property due to the failure of warning devices, barricades, signs, lights, or other precautionary measures in protecting said property. Whenever evidence is found of such damage, the Engineer may order the damaged portion immediately removed and replaced by the Vendor at their expense.

27. For all work within the City Right‐of‐Way, the Vendor shall be required to register with and submit traffic control plans for review and approval complete the application for a ROW cut permit using the City of Dallas online system at the following URL: www.rowmanagement.dallascityhall.com Contractor must have a copy of the ROW permit on site when actively working in the City ROW.

28. When the Vendor is required to remove signal cable from existing conduit at an active traffic signal, he shall keep the signals in operation to the greatest extent possible. Electrical power disconnections shall be limited to off‐peak traffic periods and shall be approved by the Engineer no less than 2 hours in advance. If the Vendor elects to install temporary overhead signal cable in order to avoid disconnecting power, the cost of installing the cable is considered incidental. No additional compensation will be granted for this work. If the Vendor is unable to remove cable from existing conduits due to swelling of the cable insulation or collapse of the conduit, he may be required to install temporary overhead cable to keep the signals in operation. The Engineer will determine when this is necessary and the Vendor will be compensated for this work through pay items listed in this agreement.

29. The Vendor may elect to provide an off‐duty police officer for traffic control assistance during the performance of the work. Such police assistance shall be arranged by the Vendor directly and shall be paid for by the Vendor at their own expense, with no additional compensation by the City.

30. The City will provide the Vendor with a copy of the plans for the work to be performed at the time of issuance of each work order. These plans shall be marked‐up by the Vendor, indicating all revisions and additions to the work, including field relocations of work. Lengths of all conduit runs view and

City of Dallas, Department of Transportation, Traffic Signals Page 5 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications conductor routing shall be clearly illustrated on the As‐Built drawings. The Vendor shall deliver these As‐Built” drawings to the Engineer within ten (10) working days after the work has been completed on each work order.

31. All bidders who have not performed work for the City of Dallas within the last three (3) years shall submit a written statement of their previous experience in installing traffic signals with their bid. The statement shall include the name of the city or area served, the contract name and/or number, the date of contract award, the number and type of traffic signals installed, the date of contract completion, a discussion of any contract delays, discrepancies, and/or liquidated damages, and the name, address, and phone number of an individual representing the client who is in a position to verify such experience.

32. CONSTRUCTION time limit for individual work orders will be calculated using the procurement and installation times as included herein. For work orders involving multiple items, material procurement time will be based on the maximum procurement time for all items included in the particular work order.

The maximum installation time will be calculated from the sum of the respective items for the particular work order. Upon receipt of a given work order, the Vendor shall prepare a CPM schedule and submit this schedule to the Engineer. Cost of preparation of this schedule shall be incidental to the applicable work order.

33. The Vendor shall submit a written request for suspension of time to the City via e‐mail, fax or letter in the event that the Vendor encounters circumstances outside their control during material procurement or installation which will delay the project schedule. When making a suspension of time request, the Vendor shall clearly state the reason(s) for the request, the effective date the time suspension should begin and the estimated date that work can resume.

The City will make the final decision as to whether to grant the suspension and when to lift the suspension.

34. A 10% retainage fee will be withheld from each invoice. If the work order is completed within the allotted number of working days (excluding times suspensions and weather delays), 100% of the retainage amount will be released. However, if the work is not completed within the allotted number of working days, liquidated damages will be withheld from the retainage fee in the amounts described in Section 1.36.1 of the latest edition of the North Central Texas Council of Government’s Standard Specifications for Public Works Construction, where the contract amount will be equal to the amount of the work order. Retainage fees will not be withheld from supplemental work orders.

35. Vendors are advised that the quantities shown on the bid forms are estimates. During the course of project, the City reserves the right to increase or decrease quantities of individual line items. Unit costs will not be adjusted to reflect changes in quantities.

36. Some of the work that will be performed under this agreement will be paid for with federal funds transferred through the Texas Department of Transportation. On those projects, the Vendor will be required to follow the Special Provisions outlined in Section A “Proposed Requirements and General Conditions” and Section C “Special Provisions—State/Federal Requirements” attached to this document.

37. If any of the requirements listed for the items are in conflict, the Vendor shall notify the Engineer in writing prior to ordering equipment and starting work.

The Engineer will direct the Vendor on how to proceed. The Vendor is responsible for any additional costs incurred if the Engineer is not notified.

38. For bidding purposes, Vendors should assume that all work performed under this agreement will be subject to these Special Provisions.

NOTE: The Vendor will not receive any extra compensation for complying with any of the requirements described in the above General Notes or the Special Provisions for the project.

City of Dallas, Department of Transportation, Traffic Signals Page 6 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

ITEM 1

MOBILIZATION FEES

1.1 METHOD OF PAYMENT

Payment for this item will cover the cost of moving personnel, construction equipment and supplies to the job site, as well as for providing individual public notices, obtaining approval for traffic control plans (TCPs) and Right of Way (ROW) cut permits with the City of Dallas online system:

www.rowmanagement.dallascityhall.com. Please refer to Chapter 43 and Chapter 43 Revisions, Approved Ordinance 19‐0758 for requirements related to TCPs, ROW permits and public notices.

UNIT OF PAYMENT: LUMP SUM

1.2 CONSTRUCTION TIME LIMIT

Once a work order has been issued, the Vendor will have a time limit of 7 working days to perform mobilization. This excludes the process for submittal and approval of TCPs and ROW cut permits. Please allow 10‐15 working days for City approval before starting any work within the ROW and for any lane closures.

City of Dallas, Department of Transportation, Traffic Signals Page 7 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

ITEM 2

INSTALLATION OF BASE‐MOUNTED CONTROLLER CABINET

2.1 INSTALLATION SPECIFICATIONS

a. The Vendor will be responsible for installing the controller cabinet on the controller cabinet foundation in the field. This work shall include transporting the cabinet from the Department of Transportation Field Operations facility at 3204 Canton Street to the job site. The City reserves the right to change the pick‐up address for the controller cabinet within City of Dallas city limits.

b. The Vendor shall mount the cabinet on the foundation, install a cabinet base extension (if provided by the City), connect all field wiring and install a ground rod in the foundation (if one does not already exist). In addition, if the cabinet foundation anchor bolts need repair in order to mount the controller cabinet, the Vendor will be required, at the direction of the Engineer, to either make repairs or replace the anchor bolts with Vendor‐supplied stainless steel wedge anchor bolts matching the diameter of the damaged anchor bolts. Repairs to existing anchor bolts or replacement of anchor bolts, as necessary, shall be at the Vendor’s expense.

c. Immediately before mounting the controller assembly on the foundation, apply a bead of silicone caulk to seal the cabinet base.

d. Wiring of the controller cabinet shall consist of connecting (1) signal wires, (2) detector wires, (3) power wires, (4) ground wires, (5) communication cabling, and (6) pedestrian pushbutton wires to their respective terminals in the cabinet. The wiring for the controller cabinet shall be connected to the terminals based on the color of the insulation on the wire in accordance with the city’s standard termination tables.

In the event of a conflict between the city’s standard termination tables and the traffic signal plans, the City’s standard shall prevail.

e. For CALTRANS cabinets, Signal conductors from the field shall be stripped back and a solderless terminal connector shall be attached by means of a ratchet‐type compression crimping tool properly sized to the wire. These terminal connectors shall be inserted under the binder head screw and tightened securely. For ATC cabinets, signal conductors from the field shall be stripped back and attached to the Phoenix connectors as per manufacturer requirements.

f. The Vendor shall connect the wiring for the controller cabinet in accordance with the City of Dallas prep note for the traffic signal. The prep note will be provided at the time of cabinet pick‐up for the Transportation Operations Field Operations facility. The Vendor shall not connect the wiring for the controller cabinet as shown on the traffic signal plans unless directed by the Engineer. The Vendor is responsible for any additional costs if the wiring is not connected as shown on the City of Dallas prep note for the traffic signal.

g. All field wiring in cabinets shall be neatly installed. Incoming cables shall be trained to their destination and neatly laced together. All spare wires shall be trimmed and neatly coiled with the ends taped. Detector lead‐in cables shall have their insulation jackets removed from their terminal strip connection to the bottom of the cabinet, and have their ground wires tied together in the bottom of the cabinet. All signal wires, detector wires and pedestrian pushbutton wires in the cabinet shall be clearly marked with a permanent label indicating the signal phase to which each is connected. Conduits in the base of the cabinets shall be sealed with duct seal or other approved sealant after all cables and conductors are installed and the traffic signal has been activated.

h. The field wiring for new traffic signal installations and traffic signal modifications shall be tested prior to initial activation of the signal. The Vendor shall test the field wiring by applying power to each of the field wires and confirming that the appropriate signal indication(s) is energized before contacting the Engineer. In no event shall AC current be applied directly (“backfed”) to the terminals on the backplane.

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Each individual field wire shall be tested by contacting the field conductor to either cabinet AC or to a flashing red output. The Vendor shall test the pedestrian push‐button field wiring by depressing each pedestrian push button and verifying the appropriate indication light is energized on the card in the detector rack. The Vendor shall repeat these tests in the presence of the Engineer.

i. If a malfunction occurs during signal activation, the Vendor will be required to keep a qualified technician on site until the malfunction is repaired or until the Engineer has given their permission for the technician to leave. If the technician leaves the site before the malfunction is repaired, and it is determined that the malfunction is attributable to the Vendor’s workmanship, then the Vendor’s technician shall return and repair the problem.

2.2 MATERIAL SPECIFICATIONS

a. Refer to Exhibit B for further installation details.

2.3 METHOD OF PAYMENT

Payment for this item will include the cost of:

a. providing and installing a ground rod in the cabinet foundation (if required),

b. repairing or replacing the foundation anchor bolts (if required),

c. transporting the cabinet to the field,

d. mounting the cabinet on the cabinet foundation,

e. providing and installing a watertight seal around the base of the cabinet,

f. labeling and terminating all field wiring in the cabinet,

g. installing a cabinet base extension (if required),

h. testing the field wiring prior to activation of the signal and

i. maintaining a qualified technician on‐site during activation of the signal.

UNIT OF PAYMENT: EACH

2.4 CONSTRUCTION TIME LIMIT

a. Once a work order has been issued, the Vendor will have a time limit of ½ working day to procure materials (if required) and 1 working day per cabinet for its installation.

City of Dallas, Department of Transportation, Traffic Signals Page 9 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

ITEM 3

INSTALLATION OF POLE‐MOUNTED CONTROLLER CABINET

3.1 INSTALLATION SPECIFICATIONS

a. The Vendor will be responsible for installing the controller cabinet on the designated signal or guy pole in the field. This work shall include transporting the cabinet from the Department of Transportation Field Operations facility at 3204 Canton Street to the job site. The City reserves the right to change the pick‐up address for the controller cabinet within City of Dallas city limits.

b. The Vendor shall mount the cabinet on the signal or guy pole, connect all field wiring, and ground the cabinet at the signal pole base.

c. Wiring of the controller cabinet shall consist of connecting (1) signal wires, (2) detector wires, (3) power wires, (4) ground wires, (5) communication cabling, and (6) pedestrian pushbutton wires to their respective terminals in the cabinet. The wiring for the controller cabinet shall be connected to the terminals based on the color of the insulation on the wire in accordance with the city’s standard termination tables.

In the event of a conflict between the city’s standard termination tables and the traffic signal plans, the City’s standard shall prevail.

d. Signal conductors from the field shall be stripped back and a solderless terminal connector shall be attached by means of a ratchet‐type compression crimping tool properly sized to the wire. These terminal connectors shall be inserted under the binder head screw and tightened securely.

e. The Vendor shall connect the wiring for the controller cabinet in accordance with the City of Dallas prep note for the traffic signal. The prep note will be provided at the time of cabinet pick‐up for the Transportation Operations Field Operations facility. The Vendor shall not connect the wiring for the controller cabinet as shown on the traffic signal plans unless directed by the Engineer. The Vendor is responsible for any additional costs if the wiring is not connected as shown on the City of Dallas prep note for the traffic signal.

f. All field wiring in cabinets shall be neatly installed. Incoming cables shall be trained to their destination and neatly laced together. All spare wires shall be trimmed and neatly coiled with the ends taped. Detector lead‐in cables shall have their insulation jackets removed from their terminal strip connection to the bottom of the cabinet, and have their ground wires tied together in the bottom of the cabinet. All signal wires, detector wires and pedestrian pushbutton wires in the cabinet shall be clearly marked with a permanent label indicating the signal phase to which each is connected. Conduits in the base of the cabinets shall be sealed with duct seal or other approved sealant after all cables and conductors are installed and the traffic signal has been activated.

g. The field wiring for new traffic signal installations and traffic signal modifications shall be tested prior to initial activation of the signal. The Vendor shall test the field wiring by applying power to each of the field wires and confirming that the appropriate signal indication(s) is energized before contacting the Engineer. In no event shall AC current be applied directly (“backfed”) to the terminals on the backplane.

Each individual field wire shall be tested by contacting the field conductor to either cabinet AC or to a flashing red output. The Vendor shall test the pedestrian push‐button field wiring by depressing each pedestrian push button and verifying the appropriate indication light is energized on the card in the detector rack. The Vendor shall repeat these tests in the presence of the Engineer.

h. If a malfunction occurs during signal activation, the Vendor will be required to keep a qualified technician on site until the malfunction is repaired or until the Engineer has given their permission for the technician to leave. If the technician leaves the site before the malfunction is

City of Dallas, Department of Transportation, Traffic Signals Page 10 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications repaired, and it is determined that the malfunction is attributable to the Vendor’s workmanship, then the Vendor’s technician shall return and repair the problem.

i. Refer to Exhibit C for further installation details.

3.2 MATERIAL SPECIFICATIONS

a. Refer to Exhibit C for details on the ground rods and L.B.’s to be used in the installation of pole‐mounted controller cabinets.

3.3 METHOD OF PAYMENT

Payment for this item will include the cost of:

a. transporting the cabinet to the field,

b. mounting the cabinet on the signal or guy pole with City‐supplied mounting brackets and band straps,

c. providing and installing a 3‐inch L.B. and associated hardware,

d. providing and installing a watertight seal between the signal pole and L.B.,

e. labeling and terminating all field wiring,

f. grounding the cabinet,

g. testing the field wiring prior to activation of the signal and

h. maintaining a qualified technician on‐site during activation of the signal.

UNIT OF PAYMENT: EACH

3.4 CONSTRUCTION TIME LIMIT

Once a work order has been issued, the Vendor will have a time limit of ½ working day to procure materials and 1 working day per cabinet for its installation.

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ITEM 4

INSTALLATION OF TRAFFIC SIGNAL HEAD

4.1 INSTALLATION SPECIFICATIONS

a. The Vendor will be responsible for installing signal heads provided by the City in the field. This work shall include transporting the signal heads, louvers, back plates and mounting hardware from the Department of Transportation warehouse at 9500 Denton Drive to the job site.

The City reserves the right to change the pick‐up address within the City Limits.

b. This item includes drilling wire feed holes, mounting the signal heads on signal poles, mast arms and/or strain wires per the plans and details shown in Exhibit “E”, and final alignment and leveling of heads at the direction of the Engineer. This item additionally includes the procurement, installation, and connection of all wiring from the nearest pole base to the signal head.

c. The Vendor shall wire all signal heads with adequate wire to tie each signal section into the signal head and with adequate wire to tie each signal head into the signal cable for the system. Wiring for the signal head shall consist of connecting the common terminal block in each signal section to the common terminal block in each signal face, and where applicable, connecting the common terminal block in each signal face to the terminal block in the signal head terminal compartment. All wire feeding through the mast arm pole structure shall be wrapped once with plastic electrical tape and wrapped again with electrical friction tape extending 12 inches on each side of the pole opening for a total of 24 inches. No splicing shall occur in the mast arm pole structure or traffic signal pole; each traffic signal head shall have a unique run of multiconductor signal cable from the terminal block in the traffic signal head to the terminal block (or equivalent) near the base of the traffic signal pole.

d. The Vendor shall use multiconductor signal cable with either 5 or 7 conductors. Cable with a different number of conductors shall not be used unless approved by the Engineer. There shall be a sufficient number of conductors so as to safely operate the traffic signal head. The wiring for the traffic signal head shall be connected to the terminal block in the traffic signal head and the terminal block (or equivalent) near the base of the traffic signal pole based on the color of the insulation on the wire in accordance with the city’s wiring standard.

e. The Vendor will be required to adjust all signal heads with louvers so that they provide visibility to the intended lane(s) of traffic.

f. Per the TMUTCD, all signal heads or parts of heads not in operation shall be covered with burlap or turned down from traffic until placed into service.

g. Refer to Exhibits D, E, F, H and I for further details on the types of signal heads to be installed and how to place signal heads on signal poles, mast arms and strain wires.

4.2 MATERIAL SPECIFICATIONS

a. All wire running from mast arm/pedestal pole bases to the signal head terminal shall be #14 AWG stranded multi‐conductor jacketed cable.

b. A screen composed of ¼‐inch hardware cloth shall be securely fastened to the front face of each louver as directed by the Engineer.

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4.3 METHOD OF PAYMENT

Payment for this item will include the cost of:

a. assembling the signal heads, back plates and mounting hardware,

b. transporting the signal heads and associated hardware to the field,

c. drilling wire feed holes and installing nylon bushings,

d. mounting the back plated signal heads on the mast arms, signal poles and/or strain wires with the appropriate hardware,

e. procuring, installing and connecting wiring from the signal heads to the terminal block at the base of the pole,

f. installing louvers,

g. procuring and installing hardware cloth for louvers,

h. covering the signal heads with Vendor supplied burlap (if required),

i. removing visibility obstructions such as tree limbs (if required), and

j. leveling and adjusting the signal heads for proper visibility.

NOTE: The Vendor will receive the same payment for the installation of a City supplied signal head regardless of the number of individual signal head sections. Payment for signal cable installed from a mast arm‐mounted or pedestal pole‐mounted signal head to the terminal block in the base of the pole shall be considered incidental to this item. Payment for signal cable installed on a span wire‐mounted/strain pole‐mounted/guy or wood pole‐ mounted signal head to the controller cabinet will be covered under ITEM 44, Procurement and Installation of Multiconductor Signal Cable and is not considered incidental to this item.

UNIT OF PAYMENT: EACH

4.4 CONSTRUCTION TIME LIMIT

Once a work order has been issued, the Vendor will have a time limit of ½ working day to procure materials and ½ working day per signal head for its

City of Dallas, Department of Transportation, Traffic Signals Page 13 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

ITEM 5

PROCUREMENT AND INSTALLATION OF TRAFFIC SIGNAL HEAD

5.1 INSTALLATION SPECIFICIATIONS

a. See section 4.1 for installation specification. Requirements regarding the transport of the pedestrian signal head do not apply to ITEM 5.

5.2 MATERIAL SPECIFICATIONS

a. Each signal head shall be a weather tight assembly of one or more signal faces of the expansible, adjustable, LED type, together with all brackets and fittings necessary for proper mounting with the type of signal support designated on Exhibits D, E, F, and H or as otherwise shown on the plans. Each signal face shall consist of one or more signal sections, rigidly and securely fastened together, capable of being positively positioned to control the movement of one direction of traffic. Each signal section shall consist of an optical unit, housing, housing door, and visor. Tie rods shall not be used to fasten signal sections together to form a signal face. All signal heads on a project shall be the product of one manufacturer.

b. The housing for each signal section shall be made of durable polycarbonate and shall be black in color unless otherwise specified in the Plans.

It shall be clean, smooth and free from flaws, cracks, blowholes, and other imperfections. It shall be designed as a self contained unit capable of separate mounting or inclusion in a signal face containing two or more signal sections rigidly and securely fastened and perfectly aligned together. It shall be equipped with round openings in the top and bottom so that it may be rotated between water‐proof supporting brackets and thus be capable of being directed at any angle in the horizontal plane. It shall be equipped with positive locking devices to maintain a specific angle of direction when in place. The doors shall be black in color and suitably hinged and held securely to the body of the housing by simple stainless steel locking devices. All other door parts, such as hinge pins, lens clips, screw, etc., shall also be of stainless steel material. A Neoprene gasket shall be used between the lenses and the signal door to exclude dust and moisture. The depth of each housing section shall not be greater than 7‐1/8” for 12 inch signal heads. Each signal housing shall accept either plastic or aluminum backplates.

c. All visors shall be made of aluminum and shall be formed such that approximately 2 inches of the visor’s depth from the face of the housing forms a full circle and the remainder of the depth forms a tunnel visor. All visors shall be black in color unless otherwise specified in the Plans, not less than 0.050 inches in thickness if aluminum. Each visor shall be designed to fit tightly against the housing door, by the means of four standard twist‐on type lugs secured with four stainless steel bolts for easy mounting and rotation. Visors shall be at least 9‐1/2 inches deep for 12” signal sections, encompass 300 degrees of the lens, and have flat black finish on the inside surface.

d. The LED traffic signal lamp unit shall meet the requirements of the Texas Department of Transportation (TXDOT) Departmental Materials Specification DMS 11121 TWELVE‐INCH LED TRAFFIC SIGNAL LAMP UNIT (12/2011 or latest revision).

e. The backplate shall also meet the

Back plates for all signal heads shall be made of aluminum. All back plates shall be capable of withstanding constant exposure to sunlight and corrosive atmospheres; shall maintain their flexibility under freezing temperatures; and shall withstand wind loads of 100 MPH after installation. All back plates shall be one piece with a non‐reflective front surface but, will include a 2” retroreflective border affixed to them.

All back plates shall have a 5” border width, shall have a minimum corner radius of 1.5 inches and shall have a nominal thickness of 0.050 inch. The finished back plate shall be pre‐drilled to fit the signal for which it is designed or shall contain drill starts for field drilling. All back

City of Dallas, Department of Transportation, Traffic Signals Page 14 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications plates shall be provided with all necessary bolts, nuts and washers for attaching to the signal head; this hardware shall be stainless steel. It shall be the Vendor’s responsibility to obtain back plates compatible with the signal head he intends to furnish on each project. All back plates on a project shall be identical and the product of one manufacturer. The backplate used shall have a 2‐inch wide fluorescent yellow AASHTO Type B or C retroreflective border conforming to TxDOT DMS‐8300 is required. Refer to Texas Department of Transportation (TXDOT) Traffic Signal Head with Backplate standard TS‐BP‐20.

Exterior finish

i. Aluminum. All exposed metal surfaces except for the inside of the visors of the assembled traffic signal head shall be electrostatically applied powder‐coat paint. The inside of the visors shall be provided with two coats of high‐grade flat black finish paint.

ii. Polycarbonate. The black colorant shall be completely impregnated in the polycarbonate material.

Unless otherwise noted on the Plans, vehicle signal heads shall be mounted with a universally adjustable signal bracket, meeting the following requirements:

i. The bracket shall allow for signal head rotation about the bracket axis, rotation about the supporting member axis, rotation on the vertical plane, and sliding of the support tube against the bracket connection point on the supporting member.

ii. The bracket shall be attached to the supporting member with a stainless steel band capable of withstanding 100 KSI tensile stress.

iii. The bracket attachment to the signal head shall assume rigid connection through the top and bottom of the signal head and fit the brand of signal head supplied by the Vendor on this project.

iv. The bracket shall be of the type to accept the number of signal sections specified in the Plans for each signal head.

v. Both arms of the bracket shall be cast from aluminum alloy and be secured about their rotational axis by set screws. The arm on one side of the tube shall be internally threaded to accommodate the threaded support tube.

vi. The entire assembly shall be capable of securely supporting a signal head under 100 mph wind loading conditions on the attached member.

vii. All parts used in this assembly shall be made of corrosion resistant material or be coated with a corrosion resistant finish.

viii. All wiring from the supporting member (signal arm or pole) to the signal head shall be completely concealed within the mounting assembly.

ix. Each bracket shall be furnished complete with the necessary hardware for installation on the signal supporting member.

x. The nominal arm length shall be nine (9) inches. Longer arms shall be substituted by the Vendor when maneuverability or visibility of the signal head is restricted.

When a mast arm or pole‐mount installation is indicated on the Plans, vehicle signal heads should be mounted with the hardware shown in Exhibit E.

When a span wire installation is indicated on the Plans, vehicle signal heads should be mounted with the hardware shown in Exhibits H and I.

City of Dallas, Department of Transportation, Traffic Signals Page 15 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

All louvers shall be of such design as to provide visibility of the signal lens to the intended lane(s) of traffic and shall meet the following requirements:

i. The internal arrangement of each louver shall consist of 5 vanes with 5 degree cut‐offs right of center.

ii. All louvers shall have a flat black finish on the external services and a dull black finish on the inside surfaces.

iii. A screen composed of ¼‐inch hardware cloth shall be securely fastened to the front face of each louver to prevent entry by birds.

iv. When indicated on the Plans, a Pelco Model SP‐1010‐TX geometrically programmed louver with visor and universal clips will be used to shield the signal displays. All other louvered signal displays shall be shielded with the louver specified in sections i., ii., and iii. above.

Refer to Exhibit D for details on the type and configuration of signal head lenses required.

f. All wire running from mast arm/pedestal pole bases to the signal head terminal shall be #14 AWG stranded multi‐conductor jacketed cable.

5.3 METHOD OF PAYMENT

This ITEM is for procurement and installation of a 3‐section display (or less). ITEM 6 is for procurement and installation of additional sections required for 4‐section and 5‐section traffic signal heads.

Payment for this item will include the cost of:

a. procuring and assembling the signal heads, back plates and mounting hardware,

b. drilling wire feed holes and installing nylon bushings,

c. mounting the back plated signal heads on the mast arms, signal poles, and/or strain wires with the appropriate hardware,

d. procuring, installing, and connecting wiring from the signal heads to the nearest pole base (for mast arm assemblies only),

e. procuring and installing louvers and hardware cloth,

f. covering the signal heads with Vendor supplied burlap (if required),

g. removing visibility obstructions such as tree limbs (if required), and

h. leveling and adjusting existing signal heads for proper visibility.

NOTE: Payment for signal cable installed from a mast arm‐mounted or pedestal pole‐mounted signal head to the terminal block in the base of the pole shall be considered incidental to this item. Payment for signal cable installed on a span wire‐mounted/strain pole‐mounted/guy or wood pole‐ mounted signal head to the controller cabinet will be covered under ITEM 44, Procurement and Installation of Multiconductor Signal Cable and is not considered incidental to this item.

UNIT OF PAYMENT: EACH

5.4 CONSTRUCTION TIME LIMIT

City of Dallas, Department of Transportation, Traffic Signals Page 16 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

Once a work order has been issued, the Vendor will have a time limit of 20 working days to procure the signal head and associated materials and ½ working day per signal head for its installation.

City of Dallas, Department of Transportation, Traffic Signals Page 17 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

ITEM 6

PROCUREMENT AND INSTALLATION OF SINGLE SECTION TRAFFIC SIGNAL HEAD

6.1 INSTALLATION SPECIFICIATIONS

See section 5.1 for installation specification.

6.2 MATERIAL SPECIFICATIONS

See section a for material specification.

6.3 METHOD OF PAYMENT

This item is for the procurement and installation of additional single traffic signal sections that are added to the 3‐section head in ITEM 5; in other words, the items provides additional compensation for the procurement and installation of 4‐section and 5‐section traffic signal heads. For example, payment for a 5‐section left turn signal head would be made using 1 EA of ITEM 5 plus 2 EA of ITEM 6.

Payment for this item will include the cost of:

a. procuring and assembling the signal heads, back plates and mounting hardware,

b. procuring and installing louvers and hardware cloth (if required),

c. covering the signal heads with Vendor supplied burlap (if required), UNIT OF PAYMENT: EACH

6.4 CONSTRUCTION TIME LIMIT

No additional construction time will be given for this item. Construction time for procurement and installation of signal heads will be determined by

ITEM 5.

City of Dallas, Department of Transportation, Traffic Signals Page 18 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

ITEM 7

INSTALLATION OF LOUVER IN EXISTING TRAFFIC SIGNAL HEAD

7.1 INSTALLATION SPECIFICATIONS

a. The Vendor will be responsible for installing the louvers in signal heads already installed in the field. This work shall include transporting the louvers from the Department of Transportation warehouse at 9500 Denton Drive to the job site. The City reserves the right to change the pick‐up address within the City Limits.

b. The Vendor will be required to adjust all signal heads with louvers so that they provide visibility to the specified lanes(s) of traffic

c. Refer to Exhibit D for details on placement of louvers in different signal head configurations.

7.2 MATERIAL SPECIFICATIONS

A screen composed of ¼ inch hardware cloth shall be securely fastened to the front of each louver as directed by the Engineer.

7.3 METHOD OF PAYMENT

Payment for this item will include the cost of:

a. transporting the louvers to the field,

b. installing the louvers,

c. installing a visor (if required),

d. procuring and installing the hardware cloth and

e. leveling and adjusting the signal heads for proper visibility.

NOTE: Payment for louvers which are installed as part of a new traffic signal head installation is covered under either ITEM 4, ITEM 5, or ITEM 6 and not under this item. This item applies only to installing louvers in existing signal heads already installed in the field. If the visor on the existing signal head will not support the louver provided by the City, then the City will be responsible for providing a visor that will accommodate the louver. The Vendor will install the louver.

UNIT OF PAYMENT: EACH

7.4 CONSTRUCTION TIME LIMIT

Once a work order has been issued, the Vendor will have a time limit of ½ working day to procure materials and ½ working day per signal head for installation of the louvers.

City of Dallas, Department of Transportation, Traffic Signals Page 19 of 234 Rev. 1 ‐ 03/25/10 Doc#BDPS‐FRM‐118 2020 General Traffic Signal Construction Specifications

ITEM 8

PROCUREMENT AND INSTALLATION OF LOUVER IN EXISTING TRAFFIC SIGNAL HEAD

8.1 INSTALLATION SPECIFICATIONS

a. The Vendor will be responsible for installing the louvers in signal heads already installed in the field.

b. The Vendor will be required to adjust all signal heads with louvers so that they provide visibility to the specified lanes(s) of traffic.

c. Refer to Exhibit D for details on placement of louvers in different signal head configurations.

8.2 MATERIAL SPECIFICATIONS

a. All louvers shall be of such…