Session No. 4D

Alternative [Innovative] Intersections

This session will focus on new guidance, current best practices, and lessons learned.

Moderator: Michael P. Mastaglio, P.E., PTOE, Urban Engineers

  • Design Guidance Update on Pedestrian & Bicycle Facilities at Alternative Intersections, Shannon Warchol, P.E., senior engineer, Kittelson & Associates, Inc.

Join us to catch up on the latest national design guidance. 2020 brought about new design guidance for pedestrian and bicycle facilities at intersections and interchanges. NCHRP is soon to release Report 948, which provides concept level designs for pedestrian and bicycle facilities at CFIs, RCUTs, MUTs, and DDIs. Based on nationwide user focus groups and over 8,000 survey comments, the Report 948 presents specific guidance considerations for each design, in the context of a holistic performance-based design process.

  • Improving Traffic Flows with Displaced Lefts, Joe Rusiewicz, P.E., senior highway engineer, TranSystems
  • Lessons Learned for the US 222 Roundabout Corridor, Andrew Thompson, EIT, transportation engineer, Urban Engineers, Inc.

PennDOT has constructed its first hybrid roundabout corridor along US 222 in the Lehigh Valley. There are few hybrid roundabouts in the Commonwealth, and with nearly 20% trucks, designing and reconstructing the corridor has been a challenge. Urban studied the first completed phase of the project at SR 222 & SR 662 analyzing the operations, safety, and efficiency of the intersection. This presentation summarizes the lessons learned about design vehicles, multilane roundabout geometry, and phasing of construction related to the SR 222 and SR 662 roundabout. It will highlight how best practices are being implemented in the six other roundabouts along the corridor and how those can be used in the planning of future multilane roundabout corridors.


Based in Pittsburgh, Shannon Warchol works with local, state, and federal clients to develop solutions in multimodal safety, design, and operations at intersections and interchanges, with a special focus on alternative and innovative designs. Warchol has led projects investigating flashing yellow arrows, leading pedestrian intervals, offset-T signalization schemes, grade-separated intersections, and video-based monitoring of pedestrian and bicycle conflicts at intersections. Warchol is a member of TRB’s Performance Based Geometric Design Committee and is a co-author of NCHRP’s forthcoming guidance on Pedestrian and Bicycle Safety at Alternative Intersections and Interchanges as well as FHWA’s forthcoming second edition of the DDI Informational Guide.

Joe Rusiewicz, P.E. is a senior highway engineer in the Pittsburgh office for TranSystems. Rusiewicz manages the highway group as well as serving as Project Manager for highway transportation projects. Rusiewicz has 13 years of experience and started his career at PennDOT District 3-0 in the design and project development units. He is currently on the Board of the ASHE Pittsburgh section as well as the steering committee for this conference. He is a graduate of Bucknell University with a degree in civil and environmental 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. Mr. 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). 


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Dec. 10, 2020

1:00 to 2:00 p.m.




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