Pennsylvania Route 222
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| Route information | ||||
| Maintained by PennDOT and City of Allentown | ||||
| Length: | 4.482 mi (7.213 km) | |||
| Existed: | 1991 – present | |||
| Major junctions | ||||
| South end: |
   I-78 / US 222 / PA 309 in Dorneyville
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| North end: |
 PA 145 in Allentown
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| Location | ||||
| Counties: | Lehigh | |||
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Pennsylvania Route 222 (PA 222) is a 4.482 mi (7.213 km)-long state highway contained entirely in Allentown, Lehigh County, Pennsylvania and its immediate suburbs mostly along Hamilton Boulevard. The route, in center city Allentown, is aligned along West Hamilton, West Linden, and West Walnut Streets. The southern terminus of the route is at Interstate 78 (I-78) and PA 309 in Dorneyville, where the roadway changes designation from PA 222 to U.S. Route 222 (US 222). The northern terminus is PA 145 in Allentown.
Hamilton Street has served as the main street in Allentown since the community was founded in the 18th century. Hamilton Street and Hamilton Boulevard became part of the William Penn Highway in 1916, PA 3 in 1924, and US 22 in 1926. In 1931, US 22 was routed to a new alignment to the north, and Hamilton Boulevard and Hamilton Street west of 15th Street became a part of US 222. In the 1950s, US 222 was rerouted to bypass Allentown, leaving Hamilton Boulevard and Hamilton Street through the city unnumbered. In 1984, the Pennsylvania Department of Transportation proposed extending US 222 from I-78/PA 309 to downtown Allentown, where it would end at PA 145. The American Association of State Highway and Transportation Officials (AASHTO) rejected extending US 222 into Allentown, and PA 222 was instead designated to run between I-78/PA 309 and US 222 and PA 145 in 1991.
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