Comparison of identification and ranking methodologies for speed-related crash locations.

Details

• Creators:
  Monsere, Christopher M. ; Bertini, Robert L. ; Bosa, Peter G.
• Corporate Creators:
  Portland State University. Department of Civil & Environmental Engineering
• Subject/TRT Terms:
  • Speeding
  • Crashes
  • Countermeasures Automobiles--Speed
  • Traffic accidents
• Publication/ Report Number:
  FHWA-OR-RD-06-14
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oregon
• Corporate Publisher:
  Oregon. Dept. of Transportation
• Abstract:
  Over 60,000 crashes were reported on the Oregon state highway system from 2000–2002. Of these, speed was a primary ; causal factor in 27% of total crashes and 36% of all fatal crashes. Excessive speed is a driver behavior that can be ; influenced by a wide variety of countermeasures. However, different methods for analyzing crash data often result in ; setting different priorities for safety improvements. The state of Oregon currently does not have a developed ; methodology for prioritizing locations for review of countermeasure deployment. When making decisions about ; countermeasure deployment with limited resources, it is important they be allocated to locations that will result in the ; greatest impact. The objective of this study was to improve the procedures used to select locations for speed-related ; safety countermeasures. The report includes a literature review focused on the relationship between speed and crashes, ; as well as past research on speed reduction techniques. An analysis of speed-related crash data indicated that a number ; of variables such as ice, curves, and others are overrepresented in speed crashes. Based on these findings, the study then ; developed and compared alternate ranking methods for speed/ice crash locations, including a unique refinement of the ; rate quality control (RQC) method, using climate data that helps identify road segments that exhibit statistically ; significant high speed/ice crash patterns. The results of the method were highlighted with a case study of identified ; highway sections using a new zonal RQC. To demonstrate the feasibility of this analysis technique, the top 20 sites ; identified by the refined screening technique were reviewed for possible countermeasures.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/21868/dot_21868_DS1.pdf
• File Type:
  [PDF - 9.48 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:3b4676af13100f288effc7f28d88960f49e279c14a1e8f8ee2c83d4195938302901a94b779b4cf0dfa1b95becb754e445e0ff44c906a25ca2c2d406cbefe024d