Safety and cost performance of intersection lighting.

Details

• Creators:
  Zhao, Guangyuan ; Li, Shuo ; Jiang, Yi
• Corporate Creators:
  Purdue University. Joint Transportation Research Program
• Corporate Contributors:
  Indiana Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Nighttime crashes
  • Light emitting diodes
  • Intersections
  • Interchanges and intersections
  • Street lighting
  • High mast lighting
  • Lighting columns
  • Highway safety
  • new lighting technologies
  • LED
  More +
• Publication/ Report Number:
  FHWA/IN/JTRP-2016/17
• Resource Type:
  Tech Report
• Geographical Coverage:
  Indiana
• Corporate Publisher:
  Purdue University. Joint Transportation Research Program
• Abstract:
  It has been reported that nationwide, about one quarter of the roadway travel commonly occurs after dark and half of the roadway ; traffic fatalities occurred at night. The nighttime traffic crash fatality rate is about three times the daytime traffic crash fatality rate. The ; problem may become worse at unlit or poorly lit critical roadway safety spots such as interchange, intersections, and railroad and ; highway crossing, particularly in adverse weather conditions. This study was conducted to investigate the lighting effects on crashes at ; Indiana intersections. The analysis of Indiana nighttime crash data to identify the contributing factors was conducted. The study ; intersection sites were selected based on crash frequencies and crash severities. Before and after field light tests were conducted to ; verify in-service light performance, including illuminance distribution and uniformity ratio. AGi32 simulation was also performed for ; three selected intersections to compare with field test results. In addition, the long term performance of demonstration luminaires at ; the I-74 & US 231 interchange was tracked and documented. This activity provides a better understanding of maintenance issues, cycles, ; and costs. Surveys to both State Highway Agencies (SHAs) and communities were conducted in order to identify perceptions from SHAs ; and the public toward lighting improvement. The community survey included questions such as the public attitudes to intersection ; lighting, effectiveness of lighting, visibility improvement, and safety improvement. To quantify safety effects of lighting at intersections, ; crash modification factors (CMFs) were developed by using two methodologies: before-and-after analysis and cross-sectional statistical ; analysis. The developed CMFs could be used to justify roadway lighting projects. Life Cycle Cost Analysis (LCCA) was conducted to ; determine the best lighting solution given a real project scenario. The analysis considered initial (luminaire and installation) cost, ; operation and maintenance cost, and energy cost.
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• Format:
  PDF
• Funding:
  SPR-3833
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31690/dot_31690_DS1.pdf
• File Type:
  [PDF - 10.96 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:e055d5739f3cdef30b1c66926e12357ab69e4ee4496ed690ed70e5de82a346af