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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation
OFFICE OF RESEARCH, DEVELOPMENT, AND TECHNOLOGY AT THE TURNER-FAIRBANK HIGHWAY RESEARCH CENTER

Comparison of the Safety of Lighting Options on Urban Freeways

Publication Information

Publication External Link:
Publication Type:
Summary Report
Publication Number:
FHWA-RD-95-164
Abstract:

This paper compares the safety of continuously lighted urban freeways and urban freeways with interchange lighting only. A total of 87.9 km (54.6 mi) of urban freeway segments with continuous lighting and 57.1 km (35.5 mi) with interchange lighting only were used in the study. All of the study sections were in the Minneapolis-St. Paul metropolitan area. The total night/day crash-rate ratio for the sections with interchange lighting only was 12 percent higher than the total night/day crash-rate ratio for sections with continuous lighting. The night/day crash-rate ratio for non-interchange areas was 18 percent higher for sections with interchange lighting only than for continuously lighted sections. The night/day crash-cost ratio for freeway sections between interchange areas without overhead lighting was calculated to be 27 percent higher than that for freeway sections between interchange areas with overhead lighting. The benefit/cost ratio of continuous lighting for the study's 22 miles of urban freeways between interchange areas is 3.7. The estimated economic benefit is $7.3 million.

Publishing Date:
1995
Publishing Office:
Office of Safety Research and Development
FHWA Program(s):
Safety
Research
Human Factors
AMRP Program(s):
Safety Data and Analysis
FHWA Activities:
Highway Safety Information System
Subject Area:
Safety and Human Factors