Global InformationPennsylvania Route 320 information
Pennsylvania Route 320 | ||||
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| Route information | ||||
| Maintained by PennDOT and Lower Merion Township | ||||
| Length | 18.832 mi[1] (30.307 km) | |||
| Major junctions | ||||
| South end |   US 13 / PA 291 in Chester | |||
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| North end |  PA 23 in Swedeland | |||
| Location | ||||
| Country | United States | |||
| State | Pennsylvania | |||
| Counties | Delaware, Montgomery | |||
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Pennsylvania Route 320 (PA 320) is a north–south state highway in southeastern Pennsylvania. The southern terminus of the 18.8-mile (30.3 km) long route is at U.S. Route 13 (US 13)/PA 291 in Chester. The northern terminus is at PA 23 in Swedeland. The route passes through suburban areas in Delaware and Montgomery counties to the west of Philadelphia, serving Swarthmore, Springfield, Broomall, Villanova, and Gulph Mills. PA 320 intersects many important highways including US 13 Business (US 13 Bus.) and Interstate 95 (I-95) in Chester, US 1 in Springfield, US 30 in Villanova, and I-76 in Gulph Mills. PA 320 runs parallel to I-476 (Mid-County Expressway) for much of its length and crosses it four times. Even though there are no direct interchanges between I-476 and PA 320, several roads that intersect PA 320 provide access to I-476.
The southernmost part of PA 320 was built as part of the Providence Road in 1684. PA 320 was first designated by 1928 between US 13 (now US 13 Bus.) in Chester and PA 23 in Lower Merion Township. PA 320 was extended south to PA 291 by 1940. The route was extended north to US 202 in Bridgeport via West Conshohocken by 1960. By 1967, the northern portion of the route was realigned to its current routing, replacing parts of PA 23 Alternate (PA 23 Alt.) and PA 23 and following part of former PA 123, with PA 23 rerouted to replace the part of PA 320 from southeast of West Conshohocken to Bridgeport. The nearby I-476 opened in 1991, reducing traffic levels on PA 320.
- ^ Bureau of Maintenance and Operations (January 2015). Roadway Management System Straight Line Diagrams (Report) (2015 ed.). Pennsylvania Department of Transportation. Retrieved June 30, 2015.
- Delaware County (PDF)
- Montgomery County (PDF)