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The Pennsylvania State Route System was established by the Sproul Road Bill passed in 1911. The system took control of over 4,000 miles of road. The system of roads continued to grow over the next few decades until continual addition of roads faced greater opposition. On October 1, 1940, the Pennsylvania Turnpike's first section of highway was ...
Since Pennsylvania first introduced numbered traffic routes in 1924, a keystone symbol shape has been used, in reference to Pennsylvania being the "Keystone State". The signs originally said "Penna" (a common abbreviation for Pennsylvania at the time), followed by the route number in block-style numbering in a keystone cutout.
State. Scenic. Legislative. The list of Interstate Highways in Pennsylvania encompasses 23 Interstate Highways —12 primary routes and 11 auxiliary routes—which exist entirely or partially in the U.S. state of Pennsylvania. In Pennsylvania, most of the Interstate Highways are maintained by the Pennsylvania Department of Transportation (PennDOT).
PA 8: One of the longest Pennsylvania state routes, this highway's southern terminus is located in Wilkinsburg, at an interchange with Interstate 376. The road then forms that borough's main street as Ardmore Boulevard, before entering Pittsburgh city limits. As the busy Penn Avenue and Washington Boulevard, the highway is a backbone of the ...
Pennsylvania Route 51 (PA 51) is a major state highway that is located in Western Pennsylvania in the United States. It runs for 89 miles (143 km) from Uniontown to the Ohio state line near Darlington, where it connects with Ohio State Route 14. PA 51 is the termination point for Pennsylvania Route 43, Pennsylvania Route 48 and Pennsylvania ...
Pennsylvania Route 23 (PA 23) is an 81.14-mile-long (130.58 km) state highway in southeastern Pennsylvania. The route begins at PA 441 in Marietta and heads east to U.S. Route 1 (US 1) at City Avenue on the border of Lower Merion Township and Philadelphia. PA 23 begins at Marietta in Lancaster County and continues east to Lancaster, where it ...
Pennsylvania Route 48 (PA 48) is an 18.9-mile-long (30.4 km) state highway located in the Pittsburgh, Pennsylvania area. The route is predominantly a two-lane highway as it runs through McKeesport and other suburbs. The entire routing of PA 48 is part of the Orange Belt, both reaching their southern termini at PA 51, southeast of Elizabeth.
Pennsylvania Route 52 (PA 52) is a 11.8-mile-long (19.0 km) state highway located in southeast Pennsylvania. The southern terminus of the route is at the Pennsylvania- Delaware state line near Kennett Square, where the road continues as Delaware Route 52 (DE 52). The northern terminus is at U.S. Route 322 Business (US 322 Bus.) in West Chester.