Circular intersection forms have been part of the transportation system in the United States for over a century. With extensive research resulting in modified and improved design features, the modern roundabout has emerged as one of the safest forms of at-grade intersections and is being implemented throughout the United States.

 In fact, the Federal Highway Administration (FHWA) has identified roundabouts as a Proven Safety Countermeasure because of their substantial ability to reduce crashes that result in injuries and fatalities.

Join instructor, Chris Tiesler, PE, as he presents findings and guidelines relative to the development and design of the roundabout. Ideal for engineers, designers, and planners interested in learning more about the fundamental principles behind roundabout design and evaluation, the class will address questions of why, where, when, and how a roundabout design should be considered as an appropriate intersection solution.

This interactive course reviews the planning phase of a roundabout, the operational analysis steps, and detailed design guidelines.

  • Planning Phase: where roundabouts should be considered and which issues are inherent in the design and operation.
  • Operational Analysis: the detailed performance of a roundabout and typical measures of effectiveness, such as capacity, delay, and queues.
  • Design Phase: considerations related to size, horizontal and vertical alignment, transit, pedestrians, bicyclists, signing, and striping.

Throughout the class, participants will have the opportunity to ask questions and discuss a wide variety of current topics in the roundabout field.

Chris Tiesler, PE, Kittelson & Associates, Inc., has extensive practical experience implementing roundabouts. He is involved in the National Cooperative Highway Research Program (NCHRP) as well as the Transportation Research Board (TRB), the Institute of Transportation Engineers (ITE), the National Committee on Uniform Traffic control Devices (NCUTCD), and the Illuminating Engineering Society of North America (IESNA).  Chris uses Roundabouts: An Informational Guide, Second Edition (NCHRP Report 672) and other national and state-level documents as the basis for the class.


a One-day Workshop in Arlington on August 2, 2018
FHWA – National Highway Institute
1310 North Courthouse Road, Suite 300
Arlington, VA

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