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CITY OF SANTA ANA <br />SPECIFICATIONS <br />PROJECT NO.: 25-6030 <br />TRAFFIC SIGNAL INSTALLATION AT SEGERSTROM AVENUE AND ROSEWOOD <br />AVENUE <br />4.06 MAINTAINING EXISTING AND TEMPORARY ELECTRICAL SYSTEMS <br />The contractor shall keep the traffic signal system in operations at all times during <br />construction except for the two switchover shutdowns described below. <br />The traffic signal system consists of but not limited to the traffic signal and safety lights, <br />vehicle and pedestrian detection, twisted pair interconnect cables, fiber optic cables, <br />Emergency Vehicle and Railroad Pre-emption Systems, CCTV and/or Video Imaging <br />Detection Systems, Wireless Communication System. The contractor is required to <br />maintain these systems in working condition during construction by providing temporary <br />wiring, splicing, relocating or any other necessary action. If necessary, the Contractor shall <br />be responsible for providing temporary traffic signal modification plans prepared by a <br />registered Traffic/Civil Engineer specializing in Traffic Signal Modifications. <br />1. Traffic Signal and Safety lights: Contractor shall provide temporary overhead <br />wiring to maintain all vehicle and pedestrian signal indications and pedestrian push <br />buttons and safety lights in operation. Maintain operation of undamaged loops <br />where feasible. Contractor shall provide temporary traffic signal equipment <br />(including detection devices) to maintain operations of signalized intersection. <br />2. Traffic Signal Fiber Optic and Interconnect Cable: Contractor shall provide <br />temporary cable and/or splicing necessary to maintain continuous communication <br />from the TMC to the traffic signal under construction and other traffic signals on <br />the same fiber optic and interconnect cable. <br />3. Emergency Vehicle and Railroad Pre-emption: Contractor shall provide temporary <br />wiring to maintain all pre-emption systems in working order. <br />4. CCTV System: Contractor shall provide temporary cable and/or splicing necessary <br />to maintain the CCTV system in working order. <br />5. Temporary Video Detection: Where temporary detection is required due to road <br />construction activity or extended overhead wiring, video detection shall be installed <br />before construction commences to ensure continuous operation of the presence <br />detection. <br />Traffic signal system shutdowns for switchover of equipment, if applicable, shall be limited <br />to two times per traffic signal. Each shutdown period shall be limited to the hours between <br />9:00 AM and 3:00 PM. First shutdown is allowed for switching from the existing wiring <br />to the temporary wiring and second shutdown is allowed for switching from the temporary <br />wiring to the new permanent wiring. If deemed necessary by the Engineer, the <br />contractor shall provide traffic control personnel to direct traffic during shutdown <br />period. The Inspector shall be notified at least five (5) working days before the intended <br />shutdowns. <br />The contractor shall furnish "BE PREPARED TO STOP" and "STOP" signs during any <br />shutdown period. Two "BE PREPARED TO STOP" signs and two "STOP" signs shall be <br />54 <br />