THE OFFSET SYSTEM-STATUS AND APPLICATION CONCEPTS

The offset system, which was developed to satisfy the need for the placement of lighting poles outside the clear roadside area, has demonstrated improved visibility which is the result of the system's uniformity, the lessened eye adaptation problems, and the lower system glare. The luminaire (output has a roadway intercept of approximately 25 degrees) is designed to mount directly to a pole top tenon and has a vertical tilt adjustment so that it can be tilted to optimize its performance for various application parameters. Data from test installations show that the offset system provides a high vertical illumination level for good visibility of objects ahead on the roadway. The pavement luminance observed from a given point under the offset system is extensively uniform, and no direct relationship is noted between measured horizontaal illumination and observed luminance.

• Corporate Authors:

  Illuminating Engineering Society

  120 Wall Street, 17th Floor
  New York, NY  United States  10005-4001
• Authors:
  • Wilson, A R
• Publication Date: 1976-4

Media Info

• Features: Figures; Tables;
• Pagination: p. 6-17
• Serial:
  • Lighting Design and Application
  • Volume: 6
  • Issue Number: 4
  • Publisher: Illuminating Engineering Society

Subject/Index Terms

• TRT Terms: Brightness; Eye; Glare; Light; Lighting columns; Location; Luminaires; Offsets (Traffic signal timing); Performance; Roadside; Visibility
• Old TRIS Terms: Placement
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00131598
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 23 1976 12:00AM