Interstate 79 (West Virginia–Pennsylvania)

Interstate 79 (West Virginia–Pennsylvania)
State	West Virginia, Pennsylvania
Type	Interstate
Route	79
Length mi	311.08
Direction a	South
Terminus a	Erie, Pennsylvania?
Direction b	North
Terminus b	Erie, Pennsylvania?

Interstate 79 (West Virginia–Pennsylvania) is an Interstate Highway linking southwestern West Virginia with northwestern Pennsylvania, forming a primary north–south corridor between the Pittsburgh metropolitan area, Morgantown, West Virginia, and the Erie metropolitan area. The route serves as a vital connection for freight traffic bound for the Great Lakes, links to the Ohio River corridor, and provides access to regional institutions such as the University of Pittsburgh, West Virginia University, and major medical centers like UPMC Presbyterian Hospital and West Virginia University Hospitals.

Route description

The highway enters West Virginia from the West Virginia Turnpike corridor near Charleston, West Virginia and proceeds northward through the Allegheny Plateau, passing near communities such as Beckley, Morgantown, and the Monongahela National Forest fringe before crossing the Pennsylvania border. In Pennsylvania, the route traverses the Monongahela River valley, skirts the western suburbs of Pittsburgh and provides direct access to downtown via interchanges with Interstate 376, Pennsylvania Route 65, and Interstate 279. North of Pittsburgh the freeway continues through counties including Butler County, Pennsylvania and Mercer County, Pennsylvania, passing near Slippery Rock University and linking to the Youngstown metropolitan area and the Erie Bayfront region prior to reaching the Erie International Airport and the Lake Erie waterfront.

History

Planning for the corridor began amid the postwar expansion of the Federal-Aid Highway Act of 1956 network, with routing influenced by industrial centers such as Pittsburgh and coalfields in Beckley, West Virginia and Connellsville, Pennsylvania. Construction phases corresponded with state departments of transportation initiatives in the West Virginia Department of Transportation and the Pennsylvania Department of Transportation, with major segments opening from the 1960s through the 1980s. Key historical events include the completion of the Morgantown interchange near West Virginia University and the reconstruction projects tied to regional economic shifts spurred by the decline of heavy industry in Youngstown, Ohio and":Pittsburgh Steel-era transformations. The corridor has been shaped by federal funding decisions involving the Bureau of Public Roads predecessor agencies and later policy through the Intermodal Surface Transportation Efficiency Act.

Exit list

Exits along the route provide connections to principal routes including U.S. Route 19, U.S. Route 22, Interstate 70, Interstate 76, Interstate 80, and Interstate 90. Major interchanges serve metropolitan hubs such as Morgantown Regional Airport, the South Hills suburbs of Pittsburgh, and industrial parks near Butler, Pennsylvania and Hermitage, Pennsylvania. The exit numbering follows mileposts established by the Pennsylvania Turnpike Commission-era guidelines in Pennsylvania and by West Virginia's mile-based system, with auxiliary ramps to local arterials like Pennsylvania Route 8 and Pennsylvania Route 356.

Services and facilities

Service plazas, truck stops, and travel plazas operate along the corridor, including national chains and regional operators that cater to commercial freight and passenger traffic. Facilities provide fueling, dining, and lodging near nodes such as Whitehall, Pennsylvania, Greensburg, Pennsylvania, Fairmont, West Virginia, and Clarksburg, West Virginia. Rest areas and emergency services coordinate with state agencies including Pennsylvania State Police and the West Virginia State Police for traveler assistance and incident response, with additional support from regional hospitals such as UPMC Mercy and Ruby Memorial Hospital.

Traffic and safety

Traffic volumes vary with urban peaks near Pittsburgh and commuter flows to Morgantown, West Virginia, influenced by seasonal tourism to destinations like the Pennsylvania Wilds and Presque Isle State Park. Freight composition includes intermodal containers serving the Port of Pittsburgh and rail terminals in Erie, Pennsylvania and Conneaut, Ohio, contributing to heavy truck percentages that affect pavement wear. Safety programs have targeted high-crash segments with engineering countermeasures inspired by the Highway Safety Manual and federal initiatives promoted by the Federal Highway Administration, including median barrier installations, shoulder widening, and intelligent transportation systems coordinated with the Pennsylvania Turnpike Commission and regional metropolitan planning organizations.

Future developments and improvements

Planned projects encompass interchange modernizations, managed lanes studies near Pittsburgh International Airport, and capacity upgrades to support economic development in the Marcellus Shale region. Funding proposals have been submitted to the Infrastructure Investment and Jobs Act programs, with targeted improvements such as bridge rehabilitations, pavement resurfacing, and wildlife crossing studies informed by partnerships with universities like Penn State University and West Virginia University. Local transit agencies and metropolitan planning organizations are evaluating multimodal connections to strengthen access to rail hubs such as Amtrak's Pennsylvanian service and regional bus networks like Greyhound Lines and Megabus.

Major junctions and connections

The corridor links to several primary routes: junctions with Interstate 68 near Morgantown, West Virginia, Interstate 70 and Interstate 76 in the Pittsburgh region, and northern connections to Interstate 90 near Erie, Pennsylvania. Other strategic connections include U.S. Route 19, U.S. Route 6, and state routes serving suburban and rural counties such as Allegheny County, Pennsylvania, Butler County, Pennsylvania, and Monongalia County, West Virginia. These interchanges facilitate freight movement toward the Great Lakes Seaway System and passenger flows toward cultural institutions like the Carnegie Museum of Natural History and sports venues including PNC Park.

Category:Interstate Highways in Pennsylvania Category:Interstate Highways in West Virginia