Interstate 70 in Pennsylvania

Interstate 70
Route information
Maintained by PennDOT and PTC
Length:	167.92 mi (270.24 km)
Major junctions
West end:	I‑70 at the West Virginia state line
	I-79 in Washington Toll PA 43 in Fallowfield Township PA 51 in Rostraver Township I-76 / Penna Turnpike / US 119 / Toll PA 66 in New Stanton I-99 / US 220 in Bedford I-76 / Penna Turnpike / US 30 in Breezewood US 522 near Warfordsburg
East end:	I-70 / US 522 at the Maryland state line
Location
Counties:	Washington, Westmoreland, Somerset, Bedford, Fulton
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Pennsylvania State Route System Interstate US State Scenic Byways Legislative ← PA 69 PA 70 → ← PA 125 PA 126 PA 127 →

PA Route 126
Location:	Warfordsburg–Breezewood
Existed:	1928–1964

PA Route 71 Alternate
Location:	Washington–New Stanton
Existed:	1957–1963

In the U.S. state of Pennsylvania, Interstate 70 (I-70) runs east–west across the southwest part of the state serving the southern fringe of the Pittsburgh metropolitan area. About half of the route is concurrent with Interstate 76 on the Pennsylvania Turnpike. This is the oldest segment of I-70 in Pennsylvania, having been completed in 1940, and is only one of two segments of I-70 that are tolled, with the other being the Kansas Turnpike. I-70 is one of only a few Interstate Highways to have a traffic signal—in this case, with U.S. Route 30 (US 30) in Breezewood, where it leaves the Turnpike and heads toward Maryland.

Two segments of I-70 in Pennsylvania are not designed to modern Interstate standards: a 37-mile segment from Washington to New Stanton, and the aforementioned half-mile signalized segment in Breezewood.

For 37 miles between the eastern end of its concurrency with I-79 in Washington and the western end of its concurrency with the Pennsylvania Turnpike in New Stanton, I-70 has several dated design features. The median narrows to the point that there are no shoulders between the median barrier and the passing lanes on both sides. On- and off-ramps at many of the interchanges are substandard in both length and geometry, which requires vehicles to decelerate in the travel lanes before entering the off-ramps, and also necessitates the use of stop signs on the on-ramps instead of yield signs. Several overpasses do not meet minimum clearance requirements, which has resulted in damage to, and from, overheight trucks. Total reconstruction efforts are ongoing that will upgrade most of this segment of I-70 and its interchanges to modern Interstate standards, and various projects are scheduled through the early 2020s.

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Wikipedia