Accident Analysis of the Conversion from Two-Way to One-Way Frontage Road Operation

Details

• Creators:
  Woods, Donald L. ; Chang, Myung-Soon
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas State Department of Highways and Public Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Service roads
  • Frontage roads
  • Crashes
  • Crash severity
  • Before and after studies
  • Transportation operations
  • Two lane highways
  • Data collection
  • Crash analysis
  • Freeways
• Publication/ Report Number:
  FHWA/TX-84/42+288-3
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas ; United States
• Edition:
  Interim: September 1979 - November 1983
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  The reduction in accidents through conversion from two-way to one-way operation on freeway frontage roads, excluding a three-month acclimation period, were examined at nine sites. Both accident frequency and accident severity were examined. Study site criteria were: I) before and after accident data be available; and 2) both of the frontage roads were converted to one-way operation at one point in time. The findings of this research suggest that an average 20 percent reduction in accident frequency, can be expected by conversion of two-way frontage roads to one-way operation. No significant difference in accident severity was indicated from the data available. Conversion to one-way operation is cost/beneficial for one year frontage road accident frequencies of 35 or more accidents per mile (both frontage roads) with major re-channelization of the ramps or 10 or more accidents per mile where no re-channelization is required, delay is not considered. Report 288-4F discusses the issue in detail. These accident frequencies suggest moderate to high traffic volumes are required to make conversion attractive.
• Format:
  PDF
• Funding:
  2-8-80-288
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/85805/dot_85805_DS1.pdf
• File Type:
  [PDF - 624.66 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:88802984bcae5f30c6d56bee310071dc0e3cf1f5796739a03a2f81472ec7706e6e743eb3ac90450a06361e8e453a0002bcd532e0267a110e6d49c542161309b7