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Roadway Lighting (Reaffirmed 2005)

This Recommended Practice provides the design basis for lighting roadways, adjacent bikeways, and pedestrian ways. It deals entirely with lighting and does not give advice on construction. It is not intended to be applied to existing lighting systems until such systems are redesigned. This Practice revises and replaces the previous edition which was published in 1983 and reaffirmed in 1993. Roadway lighting is intended to produce quick, accurate, and comfortable seeing at night that will safeguard, facilitate, and encourage vehicular and pedestrian traffic. The proper use of roadway lighting is also associated here with certain economic and social benefits including a reduction in nighttime accidents, aid to the police, facilitation of traffic flow, and the promotion of business during nighttime hours. Following an introduction that covers background material on the design criteria, there are three general subject areas discussed in this Practice: Classification definitions that carefully defines key words/concepts as they are used in the Practice with caveats regarding alternate definitions found elsewhere; Design criteria that thoroughly analyzes and illustrates the design process involving illuminance, luminance, and small target visibility (STV); and Design considerations that identifies major roadway issues (rural and urban) affecting driver visibility, discusses design aesthetics (coordination of light poles with landscaping), and weighs public scrutiny of glare and sky glow that can lead to lighting ordinances

Content Provider
Illuminating Engineering Society of North America [IESNA]


As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.