Rectangular Rumble Strip Safety Evaluation

Details

• Creators:
  Storm, Richard ; Klump, Sam ; Kosta, Olga ; Raad, May ; Wemple, Elizabeth
• Corporate Creators:
  HDR
• Corporate Contributors:
  Minnesota. Department of Transportation
• Subject/TRT Terms:
  Crash Modification Factors Crash Rates Evaluation And Assessment Highway Safety Rectangles Regression Analysis Rumble Strips Rural Highways Traffic Crashes Traffic Safety
• Publication/ Report Number:
  MN 2020-07
• Resource Type:
  Tech Report
• Geographical Coverage:
  Minnesota ; United States
• Edition:
  Final Report
• Corporate Publisher:
  Minnesota. Department of Transportation
• Abstract:
  This evaluation determined the change in crash frequency, type or severity associated with longitudinal rectangular rumble strips on rural two-lane undivided and rural four-lane divided Minnesota roadways constructed between 2012 and 2018. Crash Modification Factors (CMFs) were estimated using cross-sectional analysis to compare crash experience of locations with (i.e., centerline only, centerline + shoulder, or shoulder only) and without rectangular rumble strips. The cross-sectional analysis matched sites with and without rumble strips using matched-pair comparisons. Negative Binomial (NB) or Poisson log-linear regression models were used to model the crashes at all treatment and non-treatment sites. There was a total of approximately 1,200 miles of treated (i.e., centerline only, centerline + shoulder, or shoulder only) and untreated sites on rural two-lane roads and approximately 35 miles of treated (i.e., shoulder rumble strips) and untreated sites on rural four-lane divided roads. On rural two-lane undivided roads, the CMF for centerline + shoulder rumble strips was 0.73 for all crashes; shoulder only rumble strips had a CMF of 0.68 for all crashes. For single vehicle run-off-the-road crashes on rural two-lane highways, the CMF for rumble strips on the centerline + shoulder was 0.68; the CMF for shoulder only rumble strips was 0.76. The CMF for head-on, or opposite direction sideswipe crashes on rural two-lane roads with centerline and shoulder rumble strips was 0.64. On rural four-lane divided roads, the CMF for shoulder rumble strips for all crashes was 0.66 and 0.40 for single vehicle run-off-the-road crashes.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a174f026c9911039f5e701a134f46144756173d64d10c7a7a2dbefda9dc66495
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/53993/dot_53993_DS1.pdf
• File Type:
  [PDF - 1.91 MB ]