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Perspectives on Safety and Operational Benefits for Roundabouts

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This session will present several aspects of the safety, design and simulation of roundabouts in the contexts of multi-lane roundabouts, smaller roundabout dimensions, and a roundabout corridor.

Learning Objectives:

  • Describe methods to optimize safety performance at multi-lane roundabouts.
  • Summarize the safety and operational performance of small roundabouts and roundabout corridors.
  • Identify and assess the challenges and their resolution in calibrating VISSIM model(s) of roundabouts.

Moderator: Gordon Meth, P.E., PTOE, PTP, RSP2I, Transportation Engineering Expert Witness, Robson Forensic

Presentation Titles & Speakers:
  • Cheaper by the Dozen: Twelve Roundabouts Plus Five Miles of New Freeway Improves a Critical Evacuation Route”, Alex Wiseman, P.E., Traffic Engineer, STV, Inc., Charlotte, North Carolina
  • “Too Many Crashes at Your Multi-lane Roundabout? Learn Design Principles and Techniques to Optimize Safety”, Mark Johnson, P.E., Principal Engineer, MTJ Roundabout Engineering, Madison, Wisconsin
  • Delivering Big Results with Smaller Roundabouts”, Mark McCulloch, P.E., Senior Project Manager, Washtenaw County Road Commission, Ann Arbor, Michigan
  • “Going in Circles: The Challenges of Calibrating a Vissim Multi-lane Roundabout Corridor”, Amanda Deering, P.E., Transportation Engineer, DKS Associates, Portland, Oregon

Contributors

  • Moderator: Gordon Meth, P.E., PTOE, PTP, RSP2I, Transportation Engineering Expert Witness, Robson Forensic

  • Alex Wiseman, P.E., Traffic Engineer, STV, Inc., Charlotte, North Carolina

    Alex Wiseman works in Charlotte, NC as a Traffic Engineer. After graduating in 2016 with a B.S. and M.S. in Civil Engineering from UNC Charlotte, he has now worked at STV Engineers for five years. At STV, he is responsible for conducting traffic capacity analyses, including the analysis of multiple innovative intersections using TransModeler and other programs. Alex also designs traffic signals, produces traffic forecasts, and provides traffic engineering support for design-build projects. He has previously presented at NCSITE, SDITE, and national ITE conferences, including the SDITE Annual Meetings in 2016 and 2017 and the ITE National Meeting in 2020 (virtual).

  • Mark Johnson, P.E., Principal Engineer, MTJ Roundabout Engineering, Madison, Wisconsin

    Mark Johnson, P.E. is the Principal Engineer for MTJ Roundabout Engineering. Mark founded MTJ in 2005, after 12 years of public- and private-sector transportation engineering positions, including four years for the City of Loveland, Colorado, and four years at the Wisconsin DOT where he was a key contributor to the WisDOT roundabout program. Mark works on project teams as a subject area expert at the interface of traffic planning, analysis and design aimed at maximizing community benefits and delivering successful, well-received roundabout projects across North America. Mark is a co-author of the 2010 FHWA Roundabout Guide (NCHRP 672), and an active member of the ITE Roundabout Committee and the TRB Committee on Roundabouts & Other Design & Intersection Control Strategies.

  • Mark McCulloch, P.E., Senior Project Manager, Washtenaw County Road Commission, Ann Arbor, Michigan

    Mark McCulloch has been with Washtenaw County since 1999. He is a leader in the new trend of right-sizing roundabouts at high speed approach intersections to enhance safety and improve efficiencies while stretching limited resources for other uses. McCulloch is a graduate of Michigan State University with a Bachelor of Science in Civil Engineering.

  • Amanda Deering, P.E., Transportation Engineer, DKS Associates, Portland, Oregon

    Amanda Deering is a transportation engineer at DKS Associates in Portland, Oregon, where she focuses on travel demand modeling, corridor operations studies, and data analysis. She received her Masters from the University of Texas at Austin and her Bachelors from the University of California at Davis

July 20, 2021
Tue 4:00 PM EDT

Duration 1H 30M

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