The Street Division maintains all traffic signals and pedestrian light hardware. Hardware includes the cabinets housing the red, yellow, and green lenses and all bulbs.
The Engineering Division becomes involved when there is a loss of power to the lights or when the normal sequence is interrupted. This is usually an indication of failed wiring, motors, or computers.
The Street Division maintains 4,000 traffic signs to insure clear visibility, proper height, and proper location, as all are regulated by the Federal Highway Administration.