The Iowa State Highway Commission initiated this research to evaluate a new lowering device for tower luminaires and a new concept of tower luminaire light distribution. The research consisted of taking field measurements of lighting intensity and uniformity, pavement brightness and system glare. The data was evaluated to enable a comparison of tower lighting vs. existing conventional installations. These measurements were supplemented by visual observations. Other comparisons included construction and maintenance operations with their resultant costs and the aesthetics of the installations. Where large interchanges are to be lighted, and for special lighting requirements, it is concluded that tower lighting is advantageous. Tower installations incorporating a luminaire lowering device are superior to other systems for maintenance purposes. Overall safety, performance and appearance are considered to be better, and construction and maintenance costs less than conventional lighting. /Author/

Media Info

  • Features: Figures;
  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00155968
  • Record Type: Publication
  • Report/Paper Numbers: Project HR-154 Final Rpt.
  • Created Date: Aug 4 1977 12:00AM