Module F - Slide 31


A regular maintenance and inspection program is desirable. It is not always obvious when the equipment is not functioning properly, to those who are unfamiliar with the equipment. It may be necessary to inspect the APS more frequently than other signal equipment, particularly when it’s a new program in an area, to assure that the devices are functioning properly. Other times that inspection is needed is after repairs to signals, poles, or the controller, after changes to signal timing and after any report of problem with the device.