Presentation | 2013

Safety and Economic Impacts of Converting Frontage Roads from Two-way to One-way Operation: Preliminary Findings

Project Objectives

  • Develop accurate information to communicate types of:
  • Safety impacts
  • Accident Modification Factors
  • Economic impacts


  • Frontage roads
    • Start two-way (in rural)
  • Conversion “pressures”
    • Land development
    • Increased traffic volumes, signal operation

Survey Recommendations

  • Complete conversions as quickly as possible
  • Construct support infrastructure before the conversion
    • Improvements at existing interchanges
    • New interchanges
  • Identify opportunities for property access (cross access, shared access, alternate streets) before conversion
  • Others (see Robertson poster)