Project Description

US 322 Diverging Diamond Interchange

Submitted by the Harrisburg Section

Construction Cost $10,700,000
Project Location Ephrata, Pennsylvania
Project Owner Pennsylvania Department of Transportation
Project Designer Whitman, Requardt & Associates
Contractor J. D. Eckman, Inc.
Completion Date June, 2022

UD 322 DDI

Project Description

State Route 322 Section 036 Diverging Diamond Interchange is a safety improvement project.
The project’s primary goal is to improve safety with a secondary improvements of maintaining or
improving traffic operations. The project converted a traditional diamond interchange into a DDI
configuration to reduce the number of conflict points which increased safety. The location of
this innovated design is unique since the design team had to accommodate not only vehicles but
also pedestrians, bicyclist and the Amish Community horse and buggy traffic.

Project Features

  • Accommodate Amish horse-and-buggy traffic
  • Weekend closure of US 322
  • Close proximity of adjacent conventional signalized intersection