access control

Extent and Impacts of the VA-DOT Exception Process for Access Management Design Standards

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The Virginia Department of Transportation (VDOT) has released a report that addresses Virginia’s standards and exemption processes for commercial entrance spacing. This report also observes the extent to which commercial access exceptions are used in Virginia, and the impact on crashes at these sites. The previous VDOT Road Design Manual details requirements that new commercial entrances meet certain minimum spacing standards, though landowners may request exemptions. 

Access Control near Highway Interchanges

  • Posted on: Fri, 08/30/2013 - 22:55
  • By: fbroen
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  • Review origin of current guidelines for access separation from interchange ramps
  • Review recent Virginia study on the relationship between access spacing from interchange ramps and crash rates
  • Suggest new standards for the optimum access point spacing


Findings and Recommendations: Access Spacing from Interchange Ramp