Furnish, install, and fully integrate traffic signal controllers and cabinets, fiber optic communications cable, closed-circuit television (CCTV) camera units, and local area network (LAN) equipment utilizing Ethernet communications for the expansion of the existing closed-loop traffic signal system established under U-5943A in the Town of Clayton and surrounding areas in Johnston County in North Carolina. Refer to the signal plans for the replacement of existing signal controllers without other signal or communications upgrades at the following intersections: • 04-1412 • 04-1432 • 04-1448 • 04-1461 • 04-1466 Refer to the signal plans for additional work that includes the installation of new signal heads or modification of existing signal heads at the following intersections: • 04-1241 • 04-1423 2.2. CONSTRUCTION METHODS A. Sequence of Construction Perform construction of the project in the sequence called for in these Project Special Provisions. All work not performed in accord with the sequence of construction must be approved by the Engineer. Adherence to the sequence of construction must be reflected in the Contractor’s project schedule and all updates to the project schedule. Construction shall have minimal disruption to the existing signal operations. At all new and existing intersections maintain existing signal coordination and common controller clock time until final acceptance of the project. All clocks that are updated shall be updated from a single clock source. Review each intersection on a regular basis (no less than one time a week) in the form of a field visit and review the controller clock for drift against the common time source. Reset clock to common time source if it has drifted. Document the field visit and any actions taken in the cabinet’s maintenance diary. Record time and date of each visit, activity performed, and person performing visit. Maintain records of clock maintenance activities in a single document and furnish to the Engineer for review upon request. Failure to visit each intersection that is not online to check and update clocks will result in a liquidated damage of $500 per visit not performed. For the Sequence of Construction, the Contractor shall perform the work per the following phasing. Phase 1 – This phase shall consist of installing new infrastructure for the fiber optic communications and includes: • Installing new messenger cable and guy assemblies throughout the project area. Also, installing communications cable ID markers on messenger cable to identify and reserve fiber optic cable attachment locations on existing utility poles. • Installing new junction boxes, underground conduit, and pole risers throughout the project area.
