Squeezed Route Gets Boost From Near-Record Wall

This article discusses the construction of the world’s second largest mechanically stabilized earth (MSE) wall to carry two new lanes of traffic along a notoriously dangerous section of Mifflin County, Pennsylvania’s Route 22/322. The project, which is scheduled for completion in 2008, will be 10 miles long and cost $135 million. The construction will support two 12 foot wide lanes and is being overseen by the Pennsylvania Department of Transportation (PennDOT). These lanes will be 30 feet above the older eastbound lanes, and will require a total of 400,000 tons of backfill along with 41,000 steel reinforcing strips all contained by 8,280 feet of concrete retaining wall. Once the new road has been built, traffic will then be shifted there in order to allow improvements, such as video monitoring, a highway advisory radio system, weather system, and high-water detectors, can be made to the existing roadway.


  • English

Media Info

  • Media Type: Print
  • Features: Photos;
  • Pagination: pp 25-26
  • Serial:
    • ENR
    • Volume: 258
    • Issue Number: 15
    • Publisher: McGraw-Hill, Incorporated
    • ISSN: 0891-9526

Subject/Index Terms

Filing Info

  • Accession Number: 01050239
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: May 1 2007 11:54AM