I-95/Telegraph Road Interchange

Designing Better Roads and Safety Trails

Northern Virginia

Six major stages and 16 sub-phases helped create a construction sequence that maintained all existing lanes and minimized commuter disruptions.

The highly constrained area with challenging soil conditions included an urban, low speed interchange, a three-level ramp bridge, and low maintenance jointless bridges.

The Telegraph Road Bridge over Cameron Run replaced the old structure and was constructed in three stages in order to maintain traffic.

Existing 1-95/1-495 mainline bridges, which did not meet vertical clearance requirements and had been damaged by truck impacts over the years, were raised by as much as five feet.

Protected pedestrian walkways on both sides of I-95 help safely connect neighborhoods.

Impacts to congested transit facilities was avoided or minimized to the full satisfaction of the Washington Metropolitan Area Transit Authority.

The I-95/I-495/Telegraph Road Interchange and Mainline Reconstruction project was the largest single design-bid-build construction contract ever awarded by the Virginia Department of Transportation (VDOT). The project involved the widening and complete reconstruction of 2.5 miles of Interstate I-95/I-495, as well as the construction of nine new bridges and two bridge widenings. This project is the westernmost portion of the overall Woodrow Wilson Bridge megaproject.

Largest

VDOT design-bid-build construction contract

Our designers improved local roadway networks while avoiding and minimizing impacts to commercial buildings, residential properties, and the Cameron Run Stream Valley. We prepared advanced utility relocation, ground improvement recommendations, and advanced intelligent transportation systems and traffic management systems, which enabled VDOT to relocate major transmission towers; microtunnel private and public utility crossings of I-95/I- 495; and construct lightweight fill materials with a monitoring program before advertising the project to the public. We also helped create a safe and comfortable residential area by including trails that safely connect neighborhoods on both sides of I-95.

Client

Virginia Department of Transportation

Awards

Transportation Engineering Award

Virginia Transportation Construction Alliance

Engineering Excellence Honor Award

ACEC Metropolitan Washington

Mileage

2.5 miles

Cost

$236 million

Services

Engineering

Markets

Transportation

Regions

Mid-Atlantic