Effective measures to restrict vehicle turning movements.

Details

• Creators:
  Dixon, Karen ; Dai, Yizhen ; Zhou, Yanfen ; Avelar, Raul ; Narula, Sukrit
• Corporate Creators:
  Texas A&M Transportation Institute
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Alternatives Analysis Field Studies Highway Design Highway Safety Intersections Left Turns Literature Reviews Medians Microsimulation
• Publication/ Report Number:
  FHWA-OR-RD-16-07
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oregon;Texas
• Corporate Publisher:
  Oregon. Dept. of Transportation. Research Section
• Abstract:
  This study evaluated alternatives to raised/non-traversable medians on driveways and approaches.
  
  Raised medians are often considered as an effective technique to limit direct left-turns that may be due
  
  to a significant number of conflict points. The raised medians provide an added benefit of improved
  
  corridor aesthetics. This research effort specifically reviewed a variety of turn restriction alternatives
  
  to determine how effective they may be in addressing the safety and operational needs of the
  
  transportation network while still considering contextual sensitivities. The turn restrictions evaluated
  
  in this report are broadly separated into three categories: turn restrictions located only at the access
  
  point, turn restrictions located only in the roadway (typically some sort of median configuration), and
  
  combined turn restriction configurations. The literature review also identified the jug handle and
  
  roundabout design that could be considered to restrict turning maneuvers, but this research did not
  
  extend to these two infrastructure alternatives. The research team performed field evaluations in
  
  Oregon and Texas to determine the effectiveness of various turn restriction configurations. For the
  
  Oregon locations, the research team also evaluated recent crash histories to determine if turn
  
  restrictions were linked to observed crashes. In addition, the research team performed microsimulation
  
  evaluations to identify the operational impacts of the various turn maneuver restrictions.
  
  
• Format:
  PDF
• Funding:
  SPR 766
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fd39bebec1638721f58816b943852b5606482d6a9ff3eeca491bc630c81cd3d6c636b2ae0b80562ab0f3daf21ad47ef96e99277660765eb5b24f9fce5db53b56
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29607/dot_29607_DS1.pdf
• File Type:
  [PDF - 329.36 KB ]