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Stage II Light Rail Transit System

Light rail system reconstruction and modernization revives transit in Allegheny County.
  • The T—Gannett Fleming

    Transit modernization brings light rail system to Pittsburgh patrons. 

Port Authority of Allegheny County

Joint venture with DMJM+Harris

Pittsburgh, Pennsylvania

Our Role
Construction Management and Inspection, Engineering Support Services.

5.5 miles
Construction Cost
$400 million
Rehabilitation, New Construction
4 years
  • Enhanced transit ridership
  • Established faster, safer connection to downtown Pittsburgh
  • Provided new transit option in an area not served by rail in more than 10 years.

Since 1984, the Port Authority has operated a 25-mile light rail system called "The T," providing service to downtown Pittsburgh and several suburban communities. However, the original Overbrook branch was closed in 1993 because of increasing maintenance problems and the rising costs of renovations. 

As part of the Stage II Light Rail Transit (LRT) project, the Overbrook Line was reopened more than a decade later, providing more efficient rail service from Castle Shannon to downtown Pittsburgh. 

What We Did

Gannett Fleming provided construction management services for the program. Work was accomplished under 14 construction contracts, including design-build contracts for all systems work. Management, inspection, and support services also were required for 30,000 linear feet of retaining walls, station rehabilitations, structures, retaining walls, major grading and drainage, and rehabilitation of the operations control center.

Gannett Fleming’s responsibilities included performing constructability reviews of civil engineering and architectural components during preliminary engineering and final design at both 60 percent and 90 percent plan stages. This process identifies obstacles before a project is built to reduce or prevent errors, delays, and cost overruns. The client saved an estimated $2 million as a result of this effort.

Key Features

  • Replaced five bridges and constructed six new bridges
  • Replaced 22 original streetcar-style stops with eight high-platform, ADA-compliant light rail stations
  • Upgraded traction power network, operations control center, signals and communications, parking garages, and park and ride lots. 

Awards & Recognition

  • Award of Merit, 2006, Engineer’s Society of Western Pennsylvania
  • Award of Merit, 2005, American Society of Civil Engineers
  • Project of the Year in the Transportation Category, 2004, Engineer’s Society of Western Pennsylvania.

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