Interstate 380 or I -380 is an Interstate Highway in the U.S. state of Pennsylvania. The highway forms a north-south route connecting the city of Scranton to Interstate 80. The route is 40 kilometers long.
- WATCHTUTORIALS.ORG: Features why Pennsylvania has the nickname as Keystone State and its economy, history and geography.
I-380 near Pocono.
The highway begins in hilly terrain at Pocono Summit at Interstate 80, the highway from Cleveland to New York. The highway then runs in 2×2 lanes to the northwest, through wooded and hilly areas. Just before Scranton, you cross Interstate 84, which runs towards Hartford and starts here. I-380 then continues for a few more miles to Interstate 81 at the suburb of Dunmore.
Construction of I-380 began in 1961, and in 1962 the first 3 miles to I-81 in Scranton opened to traffic. In 1965 the southernmost 5 kilometers to Mount Pcono opened to traffic. In 1970, a long stretch of 17 miles from Mount Pocono to Yostville opened to traffic. Then in 1976 the interchange opened with I-84, spreading the opening of this relatively short link between I-80 and I-81 over a fairly long period of time.
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Interstate 476 in Pennsylvania
Interstate 476 or I -476 is an Interstate Highway in the US state of Pennsylvania. The highway forms a north-south route in the east of the state, between Chester in the Philadelphia metropolitan area and the city of Scranton to the north. The highway is a toll road north of Philadelphia and is called the Northeast Extension of the Pennsylvania Turnpike. Interstate 476 is 213 kilometers long.
I-476 between Quakertown and Allentown.
The northern portion of I-476.
see Mid-County Expressway for main topic.
The interstate begins in Chester, a suburb of Philadelphia, at the interchange with Interstate 95. The highway here has only 2×2 lanes and functions as the western bypass of the Philadelphia metropolitan area. At Springfield one crosses US 1, which forms an east-west connection in the conurbation. The Philadelphia urban area is fairly sparsely built up here, with lots of woods and large houses on spacious lots. At Conshohocken one crosses Interstate 76, the Schuylkill Expressway.
In this area, the highway has 2×3 lanes, because it also has some regional commuter traffic. At Plymouth Meeting you cross Interstate 276. This is also where the toll road portion of Interstate 476 begins. The highway then heads north and has 2×3 lanes first in the suburban region north of Philadelphia, then 2×2 lanes. After that, the area changes a bit, it becomes more sloping and less densely wooded, with regular meadows.
One then reaches Allentown, a somewhat larger city that is part of the Lehigh Valley region. Here you cross the Interstate 78, but there are no interchanges for this, you have to use the US 22, which goes a little further north. One passes along the western edge of Allentown and soon returns to the countryside. You then enter the Blue Mountains, where you pass through the 1,300-meter-long Lehigh Tunnel.
The area has now become much more hilly, these are the foothills of the Appalachian Mountains. Interstate 476 has few connections here, which are far apart. Interstate 80 is crossed at the village of Bridgeport. One then arrives at Wilkes-Barre and I-476 then parallels Interstate 81. At Dupont, the two highways are right next to each other. One then enters the metropolitan area of Scranton. At Moosic one crosses the Interstate 81, but there are no interchanges for this. I-476 then curves west of Scranton to terminate at Clarks Summit on US 11, near the junction with I-81 toward Binghamton, New York.
see also Mid-County Expressway.
The Mid-County Expressway would prove to be one of the most controversial highways in the Philadelphia area. As early as 1929, a bypass through the west of the Philadelphia region was included in the road plans. The plans were also included in a plan for a regional network of parkways in 1932, but little got off the ground. The planning was taken over by the Pennsylvania Turnpike Commission after World War II as a toll road, a tributary of the Pennsylvania Turnpike. In 1955 the route was included in the plan of the Interstate Highways. In 1958 the elaboration of the plan started, with three route alternatives, eventually the so-called ‘Blue Route’ was chosen, which would cost $ 40 million and should be ready in 1964. Opposition delayed implementation and led to a modified design that would cost $78 million.
Construction began in 1967 and two segments with 2×3 lanes were completed in 1970 and 1974, but not open to traffic. The section, completed in 1970, was 4 kilometers long between Broomall and Bryn Mawr, but had no connections to other roads, it lay unused in suburban areas. The section, completed in 1974, was 3 kilometers long and was located near Radnor. This connected to the interchange with I-76 at Consohocken, but was not opened yet because there was no connection at the southern end. Finally, in 1979 the first section was opened to traffic, a 4.5 kilometer long bypass of Consohocken, from I-76 to Germantown Pike.
There was a struggle for years about the route and in the end a very sober design was chosen with 2×2 lanes and fewer connections, in contrast to the first parts that were constructed with 2×3 lanes. Construction did not finally resume until 1985. In 1987, the southernmost 1-kilometer stretch opened between the interchange with I-95 and nearby McDade Boulevard. The remainder of the route between I-95 and I-76 was subsequently constructed and opened in its entirety on December 19, 1991. A year later, on December 16, 1992, the northern section opened, which was essentially the interchange and toll plaza with I-276. This completed the motorway after 64 years of planning
I-476’s narrow profile quickly proved to be a problem, with significant congestion within a few years of opening, as the highway was originally planned for 2×3 lanes in the 1960s and actually required 2×4 lanes by 2000.
|Germantown Pike||4,5 km||00-00-1979|
|McDade Boulevard||1,0 km||00-00-1987|
|McDade Boulevard||24,0 km||19-12-1991|
|Germantown Pike||2,0 km||16-12-1992|
Following the completion of the Pennsylvania Turnpike, a series of side branches was proposed by the Pennsylvania Turnpike Commission in 1947. In the early 1950s, planning began for the Northeast Extension, which would connect the Philadelphia region with the Lehigh Valley and the Scranton area. Construction of the highway began on March 25, 1954. It took 20 months to build the first 60 kilometers from I-276 to US 22 near Allentown, this section opened on December 23, 1955. A month later an extension of 16 kilometers opened to a temporary connection at Slatington. This completed the flat part of the Northeast Extension.
A tunnel was necessary further north. It was decided to build a single-tube tunnel with opposing traffic, this tunnel opened on April 1, 1957, simultaneously with 79 kilometers from the Northeast Extension to Pittston, just south of Scranton. Unlike the section closer to Philadelphia, this section was laid out through remote area, which consists of dense forests with few roads and villages. Later that year, on November 7, 1957, the 16-mile northernmost section was opened through the Scranton region, up to US 11 at Clarks Summit.
A problem of the Northeast Extension was the lack of connection to the Interstate Highway system, which was just being developed at the time. A connection was made to I-81 in 1962, to I-80 in 1966 and to I-78 in 1989. Traffic increased in the 1970s, mainly due to recreational traffic to The Poconos. This made the single-tube tunnel north of Slatington a bottleneck. Construction of the second tube began on February 14, 1989, which was opened to traffic on November 22, 1991. With the construction of the second tube, the New Austrian Tunnel Method (NATM) was used for the first time for a road project in the United States.
The Northeast Extension was originally numbered as State Route 9. The number I-476 was assigned only to the then-unfinished Mid-County Expressway on the west side of Philadelphia. On November 1, 1996, Interstate Highway status was approved and the route was assigned the I-476 number. This made I-476 the longest auxiliary route of an Interstate Highway in the United States.
The portion north of I-276 has been widened to 2×3 lanes in phases. The widening between I-276 and Lansdale was completed in 2016. Between 2018 and 2020, I-476 was widened further north to Quakertown to 2×3 lanes.
|Allentown (US 22)||60 km||23-11-1955|
|Allentown (US 22)||Slatington||16 km||28-12-1955|
|Pittston||Clarks Summit (US 11)||26 km||07-11-1957|
With more than 100,000 vehicles on the 2×2 portions, the Mid-County Expressway ranks as one of the most congested highways in the Philadelphia area.
|Exit 0||Exit 1||4×2|
|Exit 1||Exit 9||2×2|
|Exit 9||Exit 44||2×3|
|Exit 44||Exit 131||2×2|