The Latest on Roundabouts: Corridor Applications and Accommodating Trucks

About the Presentation:

As part of the Central Oregon Series on Transportation, Joel McCarroll and Lee Rodegerdts will be presenting some of their recent work with roundabouts. Lee will provide an overview of recent national research on the applications of corridors of roundabouts, defined as three or more roundabouts in series. Topics will include the following:

  1. Examples of the variety of roundabout corridor applications throughout the United States

  2. Lessons learned by corridor operators during their projects’ development and implementation

  3. Project development and evaluation tools developed and presented in the NCHRP Report 772, including:

  1. Travel time estimation through a series of roundabouts, and
  2. A corridor comparison framework for evaluating new potential corridors.

Joel will discuss what ODOT is doing to accommodate freight, particularly oversize and overweight loads at roundabouts. He will also discuss what other states have done to address these challenges.

Sign-in & network begins at 11:45 am, and the presentation will start at noon. Drinks and cookies will be provided. Please bring your own bag lunch. If you have any questions regarding this event, please contact Ashleigh Griffin at (541) 312-8300.

We hope you can join us!

About the Speakers:

Joel McCarroll

Joel has been with ODOT for 23 years, the last 12 years as the Region 4 Traffic Manager where he is responsible for traffic engineering, safety and operations. He also serves as Region 4’s liaison to the freight industry. He is on the Project Panel for NCHRP Panel 08-96, Integrating Goods and Services Movement by Commercial Vehicles in Smart Growth Environments. He is a P.E. and a P.T.O.E. He has a B.S. in Civil Engineering from Worcester Polytechnic Institute and an M.B.A. from Portland State University.

Lee Rodegerdts

Lee is a Principal Engineer with Kittelson & Associates, Inc. with over 21 years of broad experience in traffic operations, traffic design, transportation planning, and transportation research and education. He has been involved in all aspects of roundabout consulting, research, and guide development since 1997 and is recognized internationally for his expertise on roundabouts. Lee has led or is leading major national research projects on roundabouts, including NCHRP Report 772: Evaluating the Performance of Corridors with Roundabouts, NCHRP Report 672: Roundabouts: An Informational Guide, Second Edition; NCHRP Report 572: Roundabouts in the United States; and FHWA’s Accelerating the Implementation of Roundabouts (ongoing). He regularly presents at annual meetings of the Transportation Research Board (TRB) and the Institute of Transportation Engineers and has taught over 50 short courses on roundabouts throughout North America and overseas. He serves on TRB’s Committee on Roundabouts and the National Committee on Uniform Traffic Control Devices’ roundabout task force. He previously served as chair of the Unsignalized Intersections Subcommittee of the TRB Committee on Highway Capacity and Quality of Service. He has a B.S. in Civil Engineering from the University of California, Berkeley and an M.S. in Civil Engineering from Georgia Tech.