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Interstate 376

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Length

miles km state
15 20 Pennsylvania
15 20 Total

Interstate 376 is an east-west U.S. interstate highway spur route that lies entirely within Allegheny County, Pennsylvania. It is the primary access route between Pittsburgh and its eastern suburbs, and is locally known as "Parkway East".

I-376 eastbound in downtown Pittsburgh.

The highway is about 14 miles long, terminating in downtown Pittsburgh at Interstate 279 and at Monroeville, Pennsylvania at Interstate 76 (the Pennsylvania Turnpike) and U.S. Highway 22. I-376 is connected to the southern end of Interstate 579 by the Boulevard of Allies.

I-376 is a total of six lanes for most of its length. However, it is only four lanes through the Squirrel Hill Tunnel, a major cause of congestion. A planned extension of the Pennsylvania Turnpike, the James J. Manderino Highway (PA Turnpike 43), is being designed with an east and west northern terminus that will allow traffic to bypass the tunnel once the highway is completed.

Prior to 1974, the highway was signed as Interstate 76, but was relocated onto the Pennsylvania Turnpike when the Federal Highway Administration dropped the so-called "suffixed" Interstate Highway routes (it was numbered between 1960 and 1974 as "I-80S") in the mid-1970's.

Expansion

Recently the U.S. Congress has designated an expansion of I-376 past the Downtown Pittsburgh area and along present day I-279 past the I-79 intersection and westward along Pennsylvania State Route 60 through the Pittsburgh International Airport and north to Interstate 80 in Sharon, Pennsylvania [1]. This would make I-376 the first highway to depart its parent highway east of Pittsburgh, cross over (like the proposed I-95/I-195 crossover on the New Jersey Turnpike near Trenton when the I-95/Pennsylvania Turnpike interchange is completed in 2009) its parent highway at the New Castle exit, where PA Route 60 is part of the Pennsylvania Turnpike system, and ending at another major Interstate. This routing requires some major infrasturcture work on U.S. Highway 22 west of Downtown Pittsburgh and on PA Route 60, though both are presently limited access highways they are not up to national "interstate standards".

Cities and towns along the route (from west to east)

Interchanges from West to East

Pennsylvania

County Municipality Exit
Allegheny Pittsburgh 0 Interstate 279/US 19/US 22/US 30
Allegheny Pittsburgh 1A Interstate 279 North/US 19
Pennsylvania Pittsburgh 1B Stanwix Street
Allegheny Pittsburgh 1C Grant Street
Allegheny Pittsburgh 1D Second Avenue
Allegheny Pittsburgh 2A Forbes Avenue (eastbound only)
Allegheny Pittsburgh PA 43 Mon Faye Expressway (Proposed)
Allegheny Pittsburgh 2B Boulevard of the Allies
Allegheny Pittsburgh 3A PA 885 SOUTH
Allegheny Pittsburgh 3B PA 885 NORTH
Allegheny Pittsburgh 5 Beechwood Blvd.
Allegheny Swissvale 7 Braddock Avenue
Allegheny Wilkinsburg 8A US 30
Allegheny Wilkinsburg 8B PA 8
Allegheny Churchill 9 Greensburg Pike
Allegheny Churchill 10A PA 130
Allegheny Churchill 10B US 22
Allegheny Penn Hills I-576 Proposed
Allegheny Monroeville 14A PA 48
Allegheny Monroeville 14B Haymaker Road
Allegheny Monroeville 14C US 22
Allegheny Monroeville 15 Pennsylvania Turnpike I-76
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