WARRANTS FOR HIGHWAY LIGHTING
THE DESIGN PROCESS FOR ROADWAY LIGHTING INVOLVES VERY COMPLEX INTERRELATIONSHIPS AMONG VISUAL INFORMATION NEEDS, WARRANTING CONDITIONS FOR LIGHTING, GUIDELINES FOR LIGHTING DESIGN, AND COST-EFFECTIVE PRIORITIES FOR FUND EXPENDITURES. THIS PAPER CONCERNS A TOTAL DESIGN PROCESS FOR ROADWAY LIGHTING INCORPORATING THESE INTERRELATIONSHIPS. SPECIFICALLY, A PROCEDURE IS PRESENTED BASED ON INFORMATION NEEDS OF NIGHT DRIVERS AS RELATED TO THE INTERRELATIONSHIPS. A BASIC FRAMEWORK, CONSISTING OF INFORMATION NEEDS PRODUCED BY VARIOUS TRAFFIC FACILITY CHARACTERISTICS, IS ESTABLISHED FOR DEVELOPMENT OF THE DESIGN PROCESS. THE INFORMATION NEEDS ARE PRESENTED AS THE REQUIREMENTS TO BE SATISFIED BY ROADWAY LIGHTING, AND THE TRAFFIC FACILITY CHARACTERISTICS PRODUCING THE NEEDS SERVE AS THE JUSTIFICATION OR WARRANTING CONDITIONS FOR THE INSTALLATION OF LIGHTING. THE NUMBER OF WARRANTING CONDITIONS IS USED AS THE DESIGN CRITERIA DETERMINANT AND THE BASIS FOR COST- EFFECTIVE PRIORITIES. A PRIORITY MODEL IS PRESENTED BASED ON LIGHTING EFFECTIVENESS (THE REDUCTION OF WARRANTING CONDITIONS THROUGH THE USE OF ROADWAY LIGHTING), VEHICLES OR PEOPLE SERVED, LIGHTING INTENSITY, ROADWAY MILEAGE OVER WHICH THE PEOPLE ARE SERVED, AND TOTAL ANNUAL LIGHTING COSTS. THE PRIORITY MODEL FAVORS THOSE FACILITIES WITH HIGH WARRANTING CONDITIONS THAT CAN BE LIGHTED MOST ECONOMICALLY. IT IS CONCLUDED THAT THE TOTAL DESIGN PROCESS IS A RATIONAL APPROACH THROUGH WHICH CURRENT PRACTICES CAN BE REVISED.
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Authors:
- Walton, N E
- Rowan, N J
- Publication Date: 1972-11
Media Info
- Features: Figures; References; Tables;
- Pagination: 39 p.
- Serial:
Subject/Index Terms
- TRT Terms: Brightness; Cost effectiveness; Design standards; Information systems; Lighting; Night; Street lighting; Warrants (Traffic control devices)
- Uncontrolled Terms: Fund allocations
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00222149
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 17 1973 12:00AM