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SR 501 | I-78


Bethel Township

Bethel Township





  • Highways, Streets & Structures

  • Traffic & Parking


  • Traffic control plan that constructed the bridge in two section to limit closures and maintain access for truck traffic for all except five days of construction

  • Sidewalks & ADA accessible crosswalks constructed across the bridge 

  • Point-Of-Access study

  • Incident management plan

  • Pavement marking & delineator plans

  • Traffic control plans

  • Signing & sign lighting plans

  • Sign fabrication details

  • Joe Rudy

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.