The long-awaited construction of the I-581 and Valley View Boulevard interchange has significantly improved traffic congestion and safety in Roanoke, VA. STV provided comprehensive design services for the Virginia Department of Transportation project that includes the Valley View Mall, one of the largest malls in southwest Virginia.
In this design-build program led by Lane Construction Corporation, STV designed modifications to the existing partial cloverleaf interchange creating a diverging diamond interchange (DDI)—one of the few diverting diamond interchanges in the region. A DDI does not require vehicles to cross oncoming traffic to make left-hand turns, improving safety and moving a high volume of vehicles without increasing the number of lanes.
The DDI decreased the interchange’s overall footprint by reducing the required width of the bridge carrying Valley View Boulevard over I-581 by 37.5 feet and the southbound I-581 deceleration lane by more than 900 feet.
This design program received a Merit Award from the American Council of Engineering Companies of Virginia.
