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Roundabout Expertise

Project Details

TPD has provided transportation planning and engineering services for the design, construction, and inspection of several roundabouts throughout the Mid-Atlantic region.

Through this experience, TPD has coordinated complex issues for the design and construction of various roundabouts, including traffic counts and capacity analysis, conceptual design of the roundabout, preparation of fully engineered Final Design Plans, Roundabout Lighting Designs, preparation of Right-Of-Way Dedication Plans and legal descriptions, and presentations to Township Traffic Safety Committee, Supervisors and Public.

Notable achievements that accompany the current project experience include the construction of the first Pennsylvania roundabout on a State Numbered Route and the design of the first privately permitted multi-lane roundabout in Pennsylvania.


TPD completed transportation engineering and design services for the following roundabouts:

  • Lisburn Rossmoyne Roundabout, Lower Allen Township, Cumberland County, PA
  • Lisburn-Arcona Roundabout, Lower Allen Township, Cumberland County, PA
  • Strasburg Rd (SR 3062), Romansville Rd, Shadyside Rd, West Bradford Township, Chester County, PA
  • Trevose Rd & Somerton Rd, Bensalem Township, Bucks County, PA
  • Wyeth Drive, East Whiteland Township, Chester County, PA
  • Boonsboro Roundabout Signing, Striping and Lighting, Town of Boonsboro, Washington County, MD
  • Running Pump Rd & Noll Drive/Old Tree Drive Roundabout, East Hempfield Township, Lancaster County, PA
  • SR 114 & I-83 SB Ramps Roundabout (EPS 199784), Fairview Township, York County, PA
  • SR 0073 (Blandon Rd) and T-571 (Oley Rd) & SR 0073 (Memorial Highway / Philadelphia Pike), FASR 0662 (Memorial Highway) and T-571 (Lynx Drive), Oley Township, Berks County, PA (CONSTRUCTION INSPECTION ONLY)
  • Campus Rd (T-316) Roundabout, Mount Joy Township, Lancaster County, PA
  • McClennan Tract Mini Roundabout, East Rockhill Township, Bucks County, PA
  • Prestige Mixed-Use Development Roundabout (Route 100), Washington Township, Berks County, PA
  • Rosedale Rd & General Johnson Rd Mini-Roundabout Design, Municipality of Princeton, County of Mercer, NJ, NSPE-NJ Mercer Chapter Engineering Project of the Year Award, 2022
  • Spruce Street (CR 613) and Arctic Parkway (CR 639) Roundabout, Ewing Township, County of Mercer, NJ
  • Stagecoach Rd (CR 524) & Stillhouse Rd Roundabout (NJTPA FY20 Local Safety Engineering Assistance Program Contract D), County of Monmouth, NJ
  • Intersection Improvements at Phalanx Rd and Campus Drive, Township of Middletown, County of Monmouth, NJ
  • Washington Road and Meadows Drive Mini-Roundabout, Municipality of Princeton, Mercer County, NJ
  • Princeton Avenue (US 206Z) & Brunswick Circle Extension (CR 645), Lawrence Township, County of Mercer, NJ (CONSTRUCTION INSPECTION ONLY)
  • SR 0332 (Jacksonville Rd) and SR 2089 (Almshouse Rd), Northampton Township, Bucks County, PA
  • Residences at Providence Town Center – Arcola Roundabout, Upper Providence Township, Montgomery County, PA, NSPE-PA Philadelphia Chapter Outstanding Engineering Achievement Program Notable Award Winner, 2024
  • Waltonville Rd & Hershey West End/US 322 Ramps Roundabout, Derry Township, Dauphin County, PA
  • Walnut Street Extension Roundabout, East Lampeter Township, Lancaster County, PA