In the Commonwealth of Pennsylvania, Interstate 70 runs 171 miles from the West Virginia line near West Alexander in Washington County, to the Maryland line just south of Warfordsburg in Fulton County. For 86 miles, from New Stanton to Breezewood, I-70 shares the mainline of the Pennsylvania Turnpike with Interstate 76. I-70's intersection with U.S. Route 30 in Breezewood, which forms part of the movements to and from the Turnpike, contains one of the very few traffic lights in the Interstate Highway System.