A STUDY OF ROADWAY LIGHTING SYSTEMS
HORIZONTAL ILLUMINATION DATA IS PRESENTED FOR A STUDY ON THE EFFECT OF LUMINAIRE PLACEMENT, BOTH HEIGHT AND SPACING, FOR ROADWAY LIGHTING PURPOSES. SEVERAL DIFFERENT MANUFACTURERS EQUIPMENT WERE USED. CHARTS AND TABLES WERE PREPARED ON WHICH ENGINEERING DESIGN SELECTION CAN BE MADE. THE FOLLOWING CONCLUSIONS WERE REACHED' /1/ THE INITIAL AVERAGE ILLUMINATION ON THE ROADWAY WAS INVERSELY PROPORTIONAL TO THE MOUNTING HEIGHTS, LONGITUDINAL SPACING, AND TRANSVERSE SPACING OF THE LUMINAIRE AS WELL AS TO ROADWAY WIDTH, /2/ THE UNIFORMITY OF ILLUMINATION OF THE ROADWAY WAS DIRECTLY PROPORTIONAL TO THE MOUNTING HEIGHT OF THE LUMINAIRES, /3/ 1000-WATT LUMINAIRES COULD BE USED TO PROVIDE A HIGHER AMOUNT AND MORE UNIFORM ILLUMINATION THAN 400-WATT LUMINAIRES EVEN AT GREATER LONGITUDINAL SPACINGS, /4/ THERE WERE LARGE DIFFERENCES BETWEEN THE LUMINAIRES CLAIMED TO BE EQUAL BY THE VARIOUS MANUFACTURERS, /5/ THE HIGHER THE MOUNTING HEIGHT OF THE LUMINAIRES, THE LESS THE EFFECT OF ROADWAY WIDTH ON UNIFORMITY, AND /6/ EVEN THOUGH INITIAL AVERAGE ILLUMINATION WAS INVERSELY PROPORTIONAL TO THE MOUNTING HEIGHT OF THE LUMINAIRES, THE INITIAL MINIMUM ILLUMINATION WAS DIRECTLY PROPORTIONAL TO THE MOUNTING HEIGHT AT THE LONGER SPACINGS AND ON THE WIDER ROADWAYS. /BPR/
-
Supplemental Notes:
- Hpr, 75-1, 2-9-64-75
-
Corporate Authors:
Texas State Department of Highways & Public Transp
11th and Brazos Streets
Austin, TX United States 78701Texas Transportation Institute
Texas A&M University System, 1600 E Lamar Boulevard
Arlington, TX United States 76011 -
Authors:
- Rowan, N J
- McCoy, P T
- Publication Date: 1966-8
Subject/Index Terms
- TRT Terms: Height; Highways; Light; Location; Luminaires; Spacing; Standardization; Street lighting; Width
- Old TRIS Terms: Placement
- Subject Areas: Design; Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00219671
- Record Type: Publication
- Source Agency: Bureau of Public Roads /US
- Files: TRIS, STATEDOT
- Created Date: Jan 23 1994 12:00AM