photo of a car with headlights shining driving down a road

Session No. 4D

Session Title: Modern Day Roundabouts

Session Description: The Modern Day Roundabout is now 25 years old and is in a period of refinement. This session will focus on current best practices, lessons learned, and how to better size and design for the modern day roundabout.

Moderator Name: Michael P. Mastaglio, P.E., P.T.O.E., Urban Engineers

  • Evolution toward Cost Effective Roundabouts in Howard County, Maryland, Andrew Duerr, P.E., Associate, Wallace Montgomery
  • Evolution toward Cost Effective Roundabouts in Howard County, Maryland, Buck Bohmer, E.I.T., Project Manager—Traffic Division, Howard County, Maryland Division of Public Works
  • A Better Approach on Trucks: Accommodating Trucks at Roundabouts, Andrew Thompson, E.I.T., Transportation Engineer, Urban Engineers, Inc.
  • A Scalable and Robust Roundabout Program – WSDOT’s appropriately sized Roundabouts, Brian Walsh, P.E., State Traffic Design & Operations Engineer, Washington State Department of Transportation (WSDOT)
  • You’re Going to build a Roundabout Where!?— District 6-0 (Delaware County PA) Roundabout Project, Ross Buchan, P.E., Sr. Project Engineer, Whitman, Requardt & Associates, LLP 
  • You’re Going to build a Roundabout Where!?—District 6-0 (Delaware County PA) Roundabout Project, Fran Hanney, District 6-0 Traffic Services Manager & Roundabout Coordinator, PennDOT, District 6-0

Speaker Bios

Andrew Duerr, P.E., is a nationally-recognized expert in innovative intersection / interchange planning and design. He has been involved with more than 250 projects involving roundabouts, diverging diamond interchanges, continuous flow intersections, J-turns, and continuous Green-T intersections. His experience includes policy, peer review/design mentoring, and direct design assistance to agencies including PennDOT, MDOT SHA, DelDOT, VDOT, NCDOT, GDOT, MaineDOT, and numerous counties and cities from Canada to Texas. Andrew is married and the father of four children. In his spare time, he enjoys PSU football, archery, and supporting his children’s various sporting activities.

Buck Bohmer, E.I.T., is currently a Traffic Engineer—Project Manager for the Traffic Division, Howard County DPW. Bohmer has more than 40 years of experience in the public sector, including 12 years at Maryland SHA. He has a background in construction management and traffic engineering. Bohmer is a graduate of Johns Hopkins Whiting School of Engineering.

Andrew Thompson is a transportation engineer with Urban Engineers in their Philadelphia Office. Through this role he has lead the design of trails, transit facilities, roundabouts, and safety improvement projects. A large focus of his career has been the development of roundabouts and innovative intersections that accommodate all road users. Thompson has also worked on transit projects for the Southeastern Pennsylvania Transportation Authority (SEPTA), Amtrak, and the Federal Transit Authority (FTA). He is a member of ASCE and the Institute of Transportation Engineers, Mid-Atlantic Section (MASITE).

Brian Walsh is the State Traffic Design Engineer for the Washington State DOT (WSDOT). He has three decades of experience as a traffic and design engineer working statewide on traffic analysis, design, safety, policy and standards as they pertain to striping, intersections, temporary traffic control as well as other modes including transit, bicycle and pedestrians. With intersection safety and efficiency becoming more relevant on the nation’s roadways and the need to implement safety at intersections for all modes, more jurisdictions and their consultants are considering roundabouts to meet this need.   As a result, Brian has been at the forefront assisting his agency and other agencies and serving as a national resource on implementing roundabouts and other intersection configurations that improve mobility and safety. Walsh has a bachelor's degee in civil engineering from Montana State University, is a registered professional engineer in Washington State, and currently is serving as the chair of the TRB Roundabouts Committee and is a member of ITE. 

Fran Henney is the Senior Manager Transportation Services Division, Pennsylvania Department of Transportation, Engineering District 6-0 in King of Prussia. Henney has over 25 years of professional experience in the land development, transportation and construction industry. He is a graduate of Temple University and currently lives in western Montgomery County near Pennsburg. Henney worked as an engineer for the City of Philadelphia prior to coming to PennDOT. He is an 18-year member of the Marlborough Township Planning Commission including eight years as Chairman and two years as Vice Chair. Henney has worked on many high profile land development projects throughout Eastern Pennsylvania including Cabela’s, the Metroplex Business Park, Vanguard Great Valley, Sugarhouse Casino, the Philadelphia Premium Outlets in Limerick and many others too numerous to name here. He pioneered the original Highway Occupancy Permit Tracking system, Co-Authored Pennsylvania’s Transportation Impact Study Guidelines, Co –Authored the Dist 6-0 Americans with Disabilities Guidance Document and other publications. He has been a faculty member of the University of Pennsylvania, has spoken at nearly 100 public forums such as the PA Transportation and Safety Conference, the PA Land Development Conference, Montgomery County Bar Association, the Pennsylvania Bar Association, the Pennsylvania Land Use Institute as well as many others.

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Thursday, December 12, 2019

10:30 to Noon

Room 108

Note: Select presentations are available in PDF format for download by clicking on the highlighted link for each title. If a link is not shown, the presentation was too large to be uploaded to the website.



The Transportation Engineering and Safety Conference (TESC) attracts professionals from throughout Pennsylvania, the mid-Atlantic region, and the country. It is an authoritative source of information on pressing issues from some of the foremost experts in transportation today.

Thomas D. Larson Pennsylvania Transportation Institute

201 Transportation Research Building

The Pennsylvania State University

University Park, PA 16802-4710

Phone: 814-865-1891