In the commonwealth of Pennsylvania, United States, there are many major complex interchanges. The interchanges provide access to other major roads in Pennsylvania. This list provides the major interchanges in the state of Pennsylvania and the most massive interchanges as well and from different regions in the state.
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The Throop Dunmore Interchange or the Interstate 81 Interchange is a complex interchange in Dunmore, Pennsylvania, United States about a mile east of Scranton, Pennsylvania. The interchange includes Interstate 81, Interstate 84, Interstate 380, and U.S. Route 6. Interstate 81 comes from the west and turns north where Interstate 84 and Interstate 380 come merged from the south and they end at the interchange. U.S. Route 6 comes from the east and merges with Interstate 81 that heads north. The interchange is named after the two towns between the interchange: Throop and Dunmore.
Prior to the construction of the US 6 freeway, it was a simple 3Y which marked the beginning of I-84/380
The Mounty Nittany Interchange or The Pennsylvania State University Interchange is an interchange in State College, Pennsylvania, USA. The main campus of Pennsylvania State University (aka "Penn State") is near the interchange. The Interchange consists of two U.S. Routes and In 2007 an Interstate route. U.S. Route 322, U.S. Route 220, in 2007 Interstate 99, and Park Avenue Extension are the routes and local roads that form this interchange.
| Mid-County Interchange | |
|---|---|
| Location | |
| Plymouth Meeting, Pennsylvania | |
| Roads at junction: |
I-476 (Northeast Extension / Mid-County Expressway) I-276 / Penna. Tpk. |
| Construction | |
| Type: | Hybrid interchange |
| Maintained by: | the Pennsylvania Turnpike Commission |
The Mid-County Interchange is the largest interchange of the Pennsylvania Turnpike. It connects Interstate 276, Interstate 476, West Germantown Pike and Plymouth Road near Plymouth Meeting, Pennsylvania. I-276 is the main, east-west, portion of the Pennsylvania Turnpike and I-476, north of the interchange, is the Turnpike's Northeast Extension. The toll free portion of I-476, south of the Interchange, is known locally as the Blue Route or Mid-County Expressway. The interchange connects I-276, I-476, West Germantown Pike, Plymouth Road in a series of ramps, overpasses and toll booths. The original, smaller toll plaza handles traffic between I-276 and the two local roads, and the newer, larger toll plaza handles the through traffic on I-476. Traffic north bound from the Blue Route has ramps to both local roads, while traffic south bound from the Northeast Extension must exit onto I-276 west, before exiting through the old toll booth to connect to the local roads.
Prior to the December, 1992 completion of the Blue Route, this area had two discrete trumpet interchanges. There was the Plymouth Meeting exit off I-276 that went through a toll plaza and connected to West Germantown Pike only. The other, independent, interchange connected the terminus of the Northeast Extension, then Pennsylvania Route 9, to I-276.
In 1979 the portion of the Blue Route that would connect Interstate 76 near Conshohocken, Pennsylvania to what would become the Mid-County Interchange was opened, but it stopped about a mile short of the Interchange at Chemical Road, which intersected Germantown Pike south of its Turnpike interchange. This caused predictable problems with rush hour traffic. After the Blue Route south of I-76 was completed to Interstate 95 in 1991, the problem was worse.
Finally on 16 December 1992, the new Mid-County Interchange opened to traffic.
The Interstate 279 Interchange is a massive Interchange in Pittsburgh, Pennsylvania name after the main route in the interchange: Interstate 279. The interchange consists of Interstate 279, U.S. Route 19 Truck, Interstate 579, and Pennsylvania Route 28. Interstate 279 has a concurrency with U.S. Route 19 Truck and it also has HOV lanes on the interchange. Interstate 579 and Pennsylvania Route 28 both end at the interchange.
The Dwight D. Eisenhower Interchange, sometimes called The Eisenhower Interchange or the Eisenhower Hershey Interchange, is a complex interchange east of Harrisburg, Pennsylvania and west of Hershey, Pennsylvania. It is also part of the Capital Beltway that includes Interstate 83, Interstate 283, and U.S. Route 322. The interchange is named after former United States president Dwight D. Eisenhower.
Harrisburg Mall lies just west of the interchange off I-83.
The New Stanton Interchange is a major interchange in Westmoreland County, about 20 miles southeast of the Pittsburgh exit. At New Stanton, I-70 meets the Pennsylvania Turnpike. West of New Stanton, I-70 is an independent 4-lane highway that terminates in Utah. East of New Stanton, travelers on I-70 must continue on the PA Turnpike, until it separates from the Turnpike in Breezewood, PA. The New Stanton sees heavy truck traffic, as many of long-haul trucks going west choose I-70 over the PA Turnpike, since the Turnpike is a toll road. In addition to Interstate Highways, New Stanton also manages US 119 and PA Route 66.