The Traffic and Parking Division maintains 127 traffic signal installations throughout the City. The City is under agreement with the State of Illinois to maintain all of the traffic signals on State highways within the corporate limits of the City. As traffic volumes change, signal timings must change in order to see that efficiency is maintained. Traffic accident reports are reviewed to provide insight as to the changing safety needs of the system. This operation helps assure the reliability and proper operation of the signal system.
Maintenance involves an evaluation of existing equipment condition and relamping signal indications.
Response times to emergency malfunctions are generally within one hour.