Design criteria for median turn lanes.

Details

• Creators:
  Walton, C. Michael ; Horne, Thomas W. ; Fung, William K.
• Corporate Creators:
  University of Texas at Austin. Center for Highway Research
• Corporate Contributors:
  Texas. Department of Highways and Public Transportation. Transportation Planning Division ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Left turn lanes
  • Median lanes
  • Design
  • Traffic crashes
  • Intersections
  • Analysis of variance
  • Multiple regression analysis
  • Arterial highways
  • Median turn lanes
  • urban arterials
  More +
• Publication/ Report Number:
  FHWA/TX-78/06+212-1F
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Texas
• Corporate Publisher:
  University of Texas at Austin. Center for Highway Research
• Abstract:
  This study was initiated with an extensive literature review and survey of ; left-turn median lane practices in Texas cities. The initial phase identified ; characteristics of urban arterial accidents, basic design elements, current use of ; left-turn lanes, and existing guidelines for left-turn installations. Various ; study methods for the investigations of operational and accident characteristics ; were reviewed. One-way analysis of variance and multiple regression techniques ; were adopted for segments of the analysis. Data were collected, primarily for continuous ; two-way left-turn median lanes and raised channelized one-way left-turn ; median lanes, and analyzed through tabulation of accident contributing factors, ; lateral placement of vehicles in left-turn lane, entering and maneuvering distance ; in left-turn lane, and other pertinent factors. ; An equation and an accident prediction table for CTWLTML's were developed and ; evaluation guidelines prepared. Based on the study, the utility of left-turn ; median lanes is substantiated and they are recommended for implementation where ; appropriate investigation indicates effectiveness. The guidelines contained in ; this study report are proposed to complement currently acceptable practices, ; thereby adding to the user confidence of these practices.
  More +
• Format:
  PDF
• Funding:
  Research Study 3-8-76-212
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31513/dot_31513_DS1.pdf
• File Type:
  [PDF - 5.88 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:fdb36ce6643583572f2f15d87d2bc9c5e07704c9ba69b10eb0862ce38e78961d