Specifications include, but are not limited to:. Services to perform routine preventative maintenance at all 60 signalized intersections and five (5) flasher/pedestrian signals, that includes monthly inspection of all signal heads, pedestrian push buttons, traffic controllers, detector loops, testing and maintenance of battery back-up systems, controller cabinet mechanisms, safety lighting, soffit lighting, illuminated street name signs, communication hardware, video detection units, and wiring systems, etc. for proper operation; Repair or replace defective parts and equipment as needed. Perform extraordinary maintenance on a time and materials basis as directed by the City, or if necessitated by failure to the signal system caused by vehicle collision, civil disorder, natural disaster, or street construction.