Pennsylvania Route 51
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| Route information | ||||
| Maintained by PennDOT | ||||
| Length: | 89 mi (143 km) | |||
| Existed: | 1929 – present | |||
| Major junctions | ||||
| South end: |
  US 40 Bus. in Uniontown
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 US 119 near Uniontown I-70 in Rostraver Toll PA 43 near Clairton US 19 in Pittsburgh   I-376 / US 22 / US 30 in Pittsburgh I-79 near Coraopolis   I-376 in West Mayfield
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| North end: |
 SR 14 northwest of Darlington
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| Location | ||||
| Counties: | Allegheny, Fayette, Westmoreland, Beaver | |||
| Highway system | ||||
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| Location: | Elizabeth |
| Existed: | 2013–present |
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| Location: | Elizabeth |
| Existed: | 1970–2013 |
Pennsylvania Route 51 (PA 51) is a major state highway in Western Pennsylvania. It runs for 89 miles (143 km) from Uniontown to the Ohio state line near Darlington, where it connects with Ohio State Route 14. Route 51 is the termination point for Pennsylvania Route 43, Pennsylvania Route 48 and Pennsylvania Route 88. Century III Mall is located on this road in West Mifflin. The Route is a major connection from Uniontown and the rest of Fayette County to Pittsburgh.
The highway is four-lane highway south of Pittsburgh as it passes through Pittsburgh's South Hills, but narrows to a two-lane road through several boroughs along the Ohio River. It becomes four lanes again after passing Chippewa Township, Beaver County, Pennsylvania in Beaver County and continues to the Ohio border. In the South Hills, Route 51 (Saw Mill Run Blvd.), along with US 19, is one of the major routes in and out of Pittsburgh, as it provides access to several bridges and tunnels. Route 51 is one of the highways that enters the West End Circle, an intersection in the West End.
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Wikipedia