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At the Corner of Safe and Efficient: New Observations on Alternative Intersection Treatments to Reduce Crash Severity

This session focuses on highlighting existing best practices in the design of roundabout intersections for improved safety and operations, including a recently-completed Federal Highway Administration study to assess the effectiveness of mini-roundabouts at sites around the United States. It will also include information about the effectiveness of a new intersection treatment being implemented in Minnesota to reduce severe head-on and right-angle collisions: the restricted crossing U-turn (RCUT).
Learning Objectives
  • Identify some of the principal safety challenges associated with traditional 4-way intersections
  • Understand the basic elements of a reduced crossing U-turn (RCUT) intersection
  • Describe the impacts associated with the use of mini-roundabouts and RCUT intersections
Phil Rust, City Traffic Engineer, City of San Diego, San Diego, CA
  • Reduced Conflict Treatments in Minnesota
    James McCarthy, Traffic Operations Engineer, Federal Highway Administration, St. Paul, MN
  • All about Roundabout Safety and Capacity: the Minnesota Experience
    Derek Leuer, Principal Engineer, Minnesota Department of Transportation, Roseville, MN; Max Moreland, Director of Operations, Traffic Data, Inc., Minneapolis, MN
  • Operational, Safety, and Observational Assessment of Mini-Roundabout Successful Case Studies
    Ahmed Amer, Transportation Engineer, VHB, Ashburn, VA; Wei Zhang, Program Manager, Federal Highway Administration, McLean, VA
  • Application of Safety Design Principles for Safer, Slower Roundabout
    Mark Johnson, Principal Engineer, MTJ Roundabout Engineering, Madison, WI