Division 13-16-004
Signal Construction
Sections:
13-16-004-0001 General
13-16-004-0002 Damage to Signal Equipment
13-16-004-0003 Controller Cabinet
13-16-004-0004 Construction Procedure, Scheduling, and Inspection
13-16-004-0005 Activation
13-16-004-0006 Documentation and Warranties
13-16-004-0001 General
A. The location of utilities shown on plans is approximate and not all utilities may be shown. The contractor is responsible, in accordance with Section 730-6 of the ADOT Standard Specifications, for contacting all utilities for exact location prior to excavation.
B. The contractor shall be responsible for the 811 locating of underground signal utilities until final acceptance.
C. The contractor shall maintain a safe and secure worksite during working and nonworking hours. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))
13-16-004-0002 Damage to Signal Equipment
A. The contractor shall immediately report any damage to traffic signal equipment to the City Inspector.
B. Costs related to the repair or replacement of damaged traffic signal equipment as a result of the contractor’s negligence shall be borne by the contractor.
C. Damage to traffic signal equipment, including controller cabinet and equipment, detection loops, pull boxes, conduit, wire and cables, poles, mast arms, signal heads or related equipment as a result of project work is the responsibility of the contractor. Damage shall be repaired by an IMSA certified Traffic Signal Technician Level II. A City of Flagstaff Traffic Signal Technician shall inspect these repairs.
1. A signal cannot be dark for more than one (1) hour.
2. A signal cannot remain in flash for more than four (4) hours.
3. Damaged detection loops shall be replaced within two (2) weeks unless the City agrees in writing to a longer period.
4. Video detection and pedestrian detection shall be repaired within twenty-four (24) hours.
5. A loss of communications shall be repaired within twenty-four (24) hours.
D. If the contractor cannot respond, or cannot complete the repairs within the specified time, the City of Flagstaff Traffic Signal Shop may complete repairs. The contractor shall be charged for these repairs. The amount charged for each repair shall be the greater of either the actual accumulated charge for employee time, materials and equipment, or the mobilization cost of a two (2) person crew with service truck for two (2) hours plus materials and equipment. Charges for employee time shall include City overhead costs. Materials will be billed at replacement cost, including taxes and freight. Equipment rates will be based upon the most recent schedule of equipment rental rates for force account work, as approved by the Arizona Department of Transportation.
E. If there is a problem with a traffic signal that is not the result of the contractor’s or a subcontractor’s work, the City of Flagstaff Signal Shop will respond. If it is determined that the contractor’s work caused the problem, the contractor shall pay all costs of the repair work as described above. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))
13-16-004-0003 Controller Cabinet
A. The traffic signal controller cabinet and all controller equipment shall be delivered to the City of Flagstaff Traffic Signal Shop, 3200 W. Route 66, Flagstaff, AZ 86001, for testing and inspection a minimum of two (2) weeks before expected installation. The cabinet shall comply with ADOT Standard Specification 734-2.01, modified to change all references from the Department to the City of Flagstaff. Contact the signal shop at 928-213-2175 to schedule delivery.
B. After testing is complete, the contractor shall pick up, transport, and install the cabinet at the intersection. The City Signal Technician will connect all wiring inside the control cabinet. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))
13-16-004-0004 Construction Procedure, Scheduling, and Inspection
A. At least one (1) International Municipal Signal Association (IMSA) certified Traffic Signal Technician Level II shall be on site during all traffic signal work. Prior to the start of construction, the contractor shall provide the City with a list of IMSA certified personnel. If a jobsite inspection reveals that a certified technician is not on site, the job will be shut down.
B. At least one (1) fiber-optic technician certified in outside plant installation by the Fiber Optic Association, Inc., (FOA) or the Electronics Technicians Association, International, (ETA) shall be on site during and oversee all fiber-optic work. Technician certification shall cover installation of outside plant fiber-optic cable, connector installation, splicing, testing, troubleshooting, and documentation.
C. The contractor shall work with the City’s assigned off-site inspector regarding inspections, material and other project-related issues. A City Traffic Signal Technician will provide technical support to the off-site inspector.
D. Contractor requests for inspection shall be submitted twenty-four (24) hours prior to the requested inspection.
E. Construction inspections shall include, but are not limited to, the following:
1. A field meeting prior to project start.
2. Before backfilling trenches and boring pits, and before covering conduit.
3. Before filling pull box excavations with aggregate.
4. Before excavating pole and cabinet foundations.
5. When pole foundations are ready for concrete.
6. When placing concrete for foundations.
7. After installation of the electrical service cabinet.
8. After installation of the signal cabinet.
9. Before aboveground construction begins.
10. Prior to drilling signal poles for mounting hardware.
11. Pre-turn-on inspections to verify signal completion and operation.
12. Prior to placement of permanent signing and pavement markings.
F. The contractor shall be responsible for obtaining an over-the-counter electrical permit and paying all permit fees. The electrical service cabinet shall be inspected and approved by the City Electrical Inspector prior to a request for APS service connection. The City will supply a street address for electrical billing.
G. The contractor shall be responsible for contacting and coordinating with APS, and for meeting all service connection requirements.
H. The placement of loop detectors shall be field verified before installation.
I. Cut in place loop detectors shall be tested in accordance with ADOT specifications. Detectors not passing this inspection will not be accepted.
J. The contractor shall have all aboveground equipment on site before beginning any of the aboveground installation. Once aboveground work begins, it shall proceed continuously, until testing reveals the installation is ready for the turn-on to be scheduled.
K. Erection of the traffic signal supports shall not begin until:
1. The signal cabinet has been shop-tested and installed.
2. The electrical service cabinet has been installed and energized.
L. Aboveground Construction Procedure.
1. All traffic signal and pedestrian heads will be "bagged" with TAPCO signal head covers, or approved equal, as they are installed. Signal or pedestrian heads bagged with unapproved materials shall be removed immediately until approved bagging material is available. The bagging material will not be removed until the signal turn-on has begun.
2. Install signal poles and luminaire mast arms.
3. Install signal mast arms and heads for stop-sign-controlled approaches. Signal mast arms shall not be installed for nonstop-controlled approaches at this time.
4. Install all underground wire and cable.
5. Install and wire pole mounted signal hardware, vehicle and pedestrian signal indications, pedestrian push buttons, and video detection equipment.
6. Test all pole mounted equipment in the presence of the inspector. When all foundation grounds, wiring, vehicle and pedestrian indications, vehicle and pedestrian detection, and street lighting have been tested trouble-free, the intersection will be scheduled for turn-on.
7. On the scheduled date for turn-on, remaining signal mast arms and heads shall be installed. All vehicle and pedestrian indications and vehicle and pedestrian detection will again be tested in the presence of a City Inspector. Following a test which reveals no malfunctions, the signal will immediately be turned on. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13); Ord. 2024-13, Amended, 4/16/2024 (Res. 2024-15))
13-16-004-0005 Activation
A. Normally, turn-on will be without an extended flashing period. The contractor shall provide a police officer to control traffic throughout the turn-on process, unless alternate traffic control is submitted and approved by the City Traffic Engineering Section prior to the scheduled turn-on.
B. Appropriate short-term advance construction traffic control signage warning of the new signal and change in traffic control shall be included in the design. “TRAFFIC SIGNAL AHEAD” signage shall be placed during the hour immediately before turn-on and taken down thirty (30) days after turn-on, unless directed otherwise by the City Traffic Engineering Section. Signs may be preplaced and covered until signal activation.
C. Permanent pavement markings and signs specific to the operation of the traffic signal such as stop bars, lane use markings, signal ahead signs, or other notifications shall not be installed more than twenty-four (24) hours prior to signal turn-on, but must be installed within one (1) hour after turn-on, unless otherwise directed by the City Traffic Engineer. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13))
13-16-004-0006 Documentation and Warranties
A. Prior to final acceptance, the contractor shall document and provide to the City the following documentation:
1. Construction plans – one (1) copy in digital format (PDF).
2. Signal cabinet plans – one (1) copy in digital format (PDF).
3. As-built plans – one (1) copy in digital format (PDF/A).
4. Operation and maintenance manuals for all traffic signal equipment and systems shall be provided in digital format (PDF/A).
B. The contractor shall provide and document the following warranties, effective from the date of final acceptance:
1. Five (5) years for the traffic signal controller and traffic signal LED modules.
2. One (1) year for all other equipment, materials, and labor, including settlement of trenches. (Ord. 2017-22, Rep&ReEn, 07/05/2017; Ord. 2020-10, Amended, 09/15/2020 (Res. 2020-13); Ord. 2024-13, Amended, 4/16/2024 (Res. 2024-15))