Potential Rural Expressway Intersection Safety Treatments

A rural expressway is a high-speed, multi-lane, divided highway with partial access control. It is typically divided by a wide, depressed median and consists of both at-grade intersections and grade separated interchanges. Converting undivided rural two-lane highways to expressways is a popular highway safety improvement as expressways make passing easier and drastically reduce the likelihood of head-on and opposite direction sideswipe collisions. However, at-grade intersection collisions on rural expressways are reducing the safety benefits that should be achieved when converting rural two-lane highways to expressways. The underlying problem seems to be that expressway intersections present challenges to crossing and left-turning minor road drivers attempting to select gaps in the far-side expressway traffic stream. State Transportation Agencies (STAs) have experimented with several intersection safety treatments at problematic rural expressway intersections to improve their safety performance while avoiding costly grade separation. To assist STAs in this endeavor, this paper presents a “toolbox” of rural expressway intersection safety treatments with an emphasis on a few innovative, yet practical strategies which address the underlying problem and consequently have great potential to cost-effectively improve rural expressway intersection safety and operations. The implementation of these treatments is expected to help STAs achieve the safety benefits that should be associated with converting rural two-lane highways to expressways.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 18p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01044964
  • Record Type: Publication
  • Report/Paper Numbers: 07-1018
  • Files: BTRIS, TRIS, TRB
  • Created Date: Feb 8 2007 5:37PM