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  2. List of state routes in Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/List_of_state_routes_in...

    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.

  3. Pennsylvania State Route System - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania_State_Route...

    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 ...

  4. List of Interstate Highways in Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/List_of_Interstate...

    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).

  5. Pennsylvania Route 18 - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania_Route_18

    Pennsylvania Route 18 (PA 18) is a major north–south highway in Western Pennsylvania whose southern terminus is at West Virginia Route 69 (WV 69) at the state line in Greene County near the village of Garrison, while the northern terminus is at PA 5 in Lake City. At a length of 205 miles (330 km), PA 18 is the only state route in Pennsylvania ...

  6. List of U.S. Routes in Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._Routes_in...

    United States Numbered Highways of the Pennsylvania State Route System. Route markers for U.S. Route 6, U.S. Route 30, and U.S. Route 322. System information. Notes. All routes are assigned State Route (SR X) numbers, usually corresponding to the signed numbers. U.S. Routes are generally state-maintained.

  7. List of State Routes in Allegheny County, Pennsylvania

    en.wikipedia.org/wiki/List_of_State_Routes_in...

    Butler Street, Bridge Street, Main Street, Freeport Road, Pittsburgh Street, Freeport Road, Seventh Avenue, Tenth Avenue, Freeport Road. PA Route 28 in Etna. Butler County. old PA Route 28. State Route 1002. PA Route 28 in O'Hara Township. SR 1001 in O'Hara Township. connection between new and old PA Route 28.