Maintenance activities usually fall into one of two categories: demand or routine. Demand-responsive maintenance is response to random occurrences such as luminaire failures—i. e., lamps, fuses, ignitors, ballasts—or pole knockdowns. Routine maintenance is scheduled activities such as group lamp replacement or luminaire cleaning that are intended to produce a certain level of performance of the lighting system and eliminate some of the demand maintenance [18].
A comprehensive discussion of roadway lighting maintenance is presented in “Design Guide for Roadway Lighting Maintenance,” IESNA DG-4. In addition to the factors affecting maintenance, this guide includes information for establishing a maintenance management system that will be helpful to agencies attempting to upgrade maintenance activities.
