EVALUATION OF EXPERIMENTAL TUNNEL LIGHTING IN 30TH STREET UNDERPASS ON I-676 IN PHILADELPHIA

An experimental lighting system was installed in the underpass on I676 in Philadelphia. The lighting system was designed to provide 5 levels of illumination ranging from 500 fc horizontal down to 2 fc horizontal. Low pressure sodium vapor lamps were used for the illumination. The internal level was automatically set by a series of photocells external to the underpass and automatically provided a ratio of internal to external luminance of approximately 10%. The objective of the research was to determine the effect of the improved illumination on traffic operations. Four measures were employed: (1) effect on traffic accidents, (2) effect on vehicle velocity maintenance, (3) effect on deceleration characteristics (i.e., braking) and (4) effect on drivers' subjective responses to the new lighting.

  • Supplemental Notes:
    • Sponsored by Pennsylvania Dept. of Transportation, Harrisburg. Bureau of Materials, Testing and Research.
  • Corporate Authors:

    Franklin Institute

    Research Laboratories, Benjamin Franklin Parkway
    Philadelphia, PA  United States 

    Pennsylvania Department of Transportation

    Bureau of Materials, Testing and Research, 1118 State State
    Harrisburg, PA  United States  17112
  • Authors:
    • Janoff, M S
  • Publication Date: 1975-3

Media Info

  • Pagination: 83 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00092418
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FIRL-F-C3861 Final Rpt.
  • Files: NTIS, STATEDOT
  • Created Date: Nov 5 1976 12:00AM