Highway Maintenance Response Time Standards

DRAFTinclude modification to align installed equipment with the current state of the practice(i.e. video detection, wireless communication equipment, closed loop systems, etc.)Replacement of Model 179 Controllers – Currently, all Department owned signalsutilize Model 179 controllers. This technology is 20-25 year old, parts areincreasingly difficult to procure and limited functionality (i.e. cannot be integratedwith ITS systems). These devices will be converted to Model 2070 controllers(current national standard) within the next 10 years.LED Conversion - The conversion to LED heads has been completed at roughly2/3 of the NYSDOT maintained signals. There are ~2000 incandescent locationsyet to convert. The use of LED bulbs reduces power consumption by 90%,reduces “response” maintenance due to bulb failure (last 5 yrs vs. 1 year forincandescent), and reduces the likelihood of dark signals and associated risk.Loop Replacement - Loop replacement is required where existing detectiondevices have been disturbed by construction activity, is necessary due topavement overlays, or where any wire breakage has occurred.Equipment Life Cycle Replacement – Signal equipment has an expected lifespan that can be broken into two main components; 1) poles/foundations and 2)signal heads, controllers and hardware.1) The desirable design life of a signal system (excluding poles) is 15 years.Currently the statewide average age of signals is about 20 years, with roughly25% of locations having signals as old as 25-30 years. A 15 year replacementcycle for 6000 signals requires the replacement of 400 signals/year. It may bepossible to upgrade the signal equipment (heads, controllers, hardware) if thepoles/foundations have an adequate remaining lifespan.14