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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.
The original Pennsylvania Route 3 was the designation for the William Penn Highway running from Hanover Township to Easton.After its decommissioning in 1930, PA 3 was renumbered in several areas to extend active routes, including US 22 from the WV/PA state line to Harrisburg, PA 60 from Robinson Township to Pittsburgh, US 322 from Harrisburg to Hershey, US 422 from Hershey to Wyomissing, US ...
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.
Former route of US 222 through the Reading area that was replaced by multiple expressways US 322 Bus. 9: 14 I-99/US 220/US 322 near State College: US 322 near Boalsburg: 1985: current Former route of US 322 through State College and Boalsburg that was replaced by an expressway US 322 Truck: 4: 6.4 US 30 Bus./US 322 in Downingtown: US 30 Bus./
PA Route 51, State Route 3109, State Route 3077, State Route 3007, State Route 3002, PA Route 18, State Route 6018, State Route 4042, PA Route 68: 77 Beaver: New Castle: 78 Beaver: Butler: 79 Butler: New Castle: 80 New Castle: Mercer: 81 New Castle: Ohio state line 82 Mercer: Meadville: 83 Conneaut Lake: Ohio state line 84 Meadville: Erie: 85 ...
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).
0–9. Pennsylvania Route 1 (1920s) Pennsylvania Route 2; Pennsylvania Route 3 (1924) Pennsylvania Route 4; Pennsylvania Route 5 (1925) Pennsylvania Route 6 (1920s)
The route between US 30 in Breezewood and US 522 in Warfordsburg was originally known as Pennsylvania Route 126 (PA 126). In 1957, preliminary numbers were assigned; the longer route via Pittsburgh (now I-79 and I-376 ) became the main line of I-70, while the southern bypass (now I-70) became Interstate 70S ( I-70S ). [ 5 ]