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Swarthmore Roundy


Swarthmore College






  • Highways, Streets & Structures

  • Traffic & Parking

  • Community Transportation

  • Transit


  • Municipal & PennDOT Traffic Impact Studies

  • Trip generation & pedestrian studies

  • Data collection & traffic analysis

  • Municipal, PennDOT, SEPTA coordination

  • Expert witness testimony

  • Conceptual roadway improvement plans, including a roundabout

  • Midblock pedestrian crossing evaluation & design

  • Extensive public engagement

  • Nicole Kline-Elsier, P.E., PTOE

  • Jamie Kouch, P.E.

McMahon was engaged by Swarthmore College to resolve a complicated and dangerous intersection on Chester Road (SR 0320) in connection with their Swarthmore Town Center West development concept, opposite Rutgers Avenue and Swarthmore Borough’s central business district.


The existing intersection was a unique five-leg, unsignalized expanse which was dangerous and confusing for drivers and completely prohibited pedestrian crossing of its 140-foot width. This essentially divided the campus from the businesses in the downtown area. As part of the project, McMahon designed and oversaw the construction of a single-lane roundabout at the intersection of Chester Road with Rutgers Avenue, Station Square East and West, and relocated Fieldhouse Lane, which now serves as access to the College’s south campus, and provides a key multimodal connection between campus and Swarthmore Borough’s commercial business district and town center.


PennDOT granted final design approval in August 2014. Construction began in September 2014, and the roundabout was opened to traffic on July 11, 2015.


The Chester Road project required the incorporation of a “Complete Streets” transportation solution, extensive community outreach with Swarthmore College and Swarthmore Borough, and included many unique design, permitting and construction challenges that were overcome during the many phases of the project.


Click HERE to see our featured video on the Swarthmore Roundy project. This video is currently also used on the PennDOT Roundabouts page HERE.


  • PSPE - Delaware County - 2018 Outstanding Project Award 

  • ACEC/PA Diamond Award - Small Project Category

  • William H. Bates Award - Delaware County Planning Commission

"Inevitably someone will stop me and say, This is so great! I can't believe we didn't do this before." - Jane Billings - Borough Manager​

"[McMahon] had a tremendous amount of experience and expertise that they could bring, both to our project and to the dialogue that we needed to have with the Borough residents  and Borough government." - Jan Semler - Director of Capital Planning & Project Management - Swarthmore College

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