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Our Projects

Challenge
  • Maintaining truck access to the adjacent business park at the request of the Governor’s Office was a critical issue for this project.
  • Coordination with the local municipality to provide safe access for pedestrians traveling from the Borough on one side of the bridge to the library on the other side of the bridge.
Our Solutions
  • McMahon developed a traffic control plan that constructed the bridge in two sections to limit closures & maintain access for truck traffic during all but five days of construction.
  • Sidewalks and ADA accessible crosswalks were constructed across the bridge to provide safe travel for pedestrians.
  • Point-of-access study
  • Incident management plan
  • Pavement marketing & delineator plans
  • Traffic control plans
  • Signing & sign lighting plans
  • Sign fabrication details

S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project

Mid AtlanticTraffic & Parking
Bethel Township, Berks County, PA
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates
  • S.R. 0501, Section O1B over Interstate 78 Interchange Improvement Project by McMahon Associates

McMahon was retained to provide transportation engineering services for this interchange Improvement project by PennDOT District 5-0. McMahon had previously completed a Transportation Impact Fee Roadway Sufficiency Analysis and Capital Improvement Plan for Bethel Township which included the interchange. Based on this background traffic study and a Traffic Impact Study prepared for the adjacent Berks County Industrial Development Authority, McMahon developed multiple design alternatives for PennDOT to evaluate.

Project Goals:
• Reconstruction of an 8.8 mile section of I-78
• Complete replacement of all mainline pavements
• Reconfiguration of the Krumsville Interchange (Exit 40)
• Widening or replacement of 14 structures
• Addition of truck climbing lanes
• Various safety improvements

The new bridge consists of a single span pre-stressed concrete PA-bulb-tee beam structure.

Construction was approximately $10 million. Project tasks included topographic survey, conceptual design plans, alternatives analysis, public involvement, bridge design, signal design, and roadway design.