PROPOSED AMERICAN NATIONAL STANDARD PRACTICE FOR ROADWAY LIGHTING

This "American National Standard Practice for Roadway Lighting" has been approved under the rules of procedure of the American National Standards Institute and under the sponsorship of the Illuminating Engineering Society of North America (IES). This document has been revised from the 1977 Standard Practice to include, in addition to an illuminance method for design, a luminance method that incorporates veiling luminance. Although the luminance method is preferred for most situations, illuminance is regarded as an acceptable alternative. Design and calculations are now specified in metric units. Changes in the Appendices (which are not part of the Standard Practice but are provided as supplemental information) include a new Appendix on visibility and one containing metric conversion tables.