Interstate 376 (I-376) is a major auxiliary route of the Interstate Highway System in the US state of Pennsylvania, located within the Allegheny Plateau. It runs from I-80 near Sharon south and east to a junction with the Pennsylvania Turnpike in Monroeville, after having crossed the Pennsylvania Turnpike at an interchange in Big Beaver. The route serves Pittsburgh and its surrounding areas and is the main access road to Pittsburgh International Airport (PIT). Portions of the route are known as the Beaver Valley Expressway, Southern Expressway, and Airport Parkway. Within Allegheny County, the route runs along the majority of the Penn-Lincoln Parkway, known locally as Parkway West and Parkway East. It is currently the ninth-longest auxiliary Interstate route in the system and second only to I-476 within Pennsylvania.
Transportation in Philadelphia involves the various modes of transport within the city and its required infrastructure. In addition to facilitating intracity travel, Philadelphia's transportation system connects Philadelphia to towns of its metropolitan area and surrounding areas within the Northeast megalopolis.
The Pittsburgh and Lake Erie Railroad, also known as the "Little Giant", was formed on May 11, 1875. Company headquarters were located in Pittsburgh, Pennsylvania. The line connected Pittsburgh in the east with Youngstown, Ohio in the Haselton neighborhood in the west and Connellsville, Pennsylvania to the east. It did not reach Lake Erie until the formation of Conrail in 1976. The P&LE was known as the "Little Giant" since the tonnage that it moved was out of proportion to its route mileage. While it operated around one tenth of one percent of the nation's railroad miles, it hauled around one percent of its tonnage. This was largely because the P&LE served the steel mills of the greater Pittsburgh area, which consumed and shipped vast amounts of materials. It was a specialized railroad deriving much of its revenue from coal, coke, iron ore, limestone, and steel. The eventual closure of the steel mills led to the end of the P&LE as an independent line in 1992.
The Schuylkill Expressway, locally known as "the Schuylkill", is a freeway through southern Montgomery County and the city of Philadelphia. It is the easternmost segment of Interstate 76 (I-76) in the U.S. state of Pennsylvania. It extends from the Valley Forge interchange of the Pennsylvania Turnpike in King of Prussia, paralleling its namesake Schuylkill River for most of the route, southeast to the Walt Whitman Bridge over the Delaware River in South Philadelphia. It serves as the primary corridor into Philadelphia from points west. Maintenance and planning for most of the highway are administered through Pennsylvania Department of Transportation (PennDOT) District 6, with the Delaware River Port Authority (DRPA) maintaining the approach to the Walt Whitman Bridge.
The Smithfield Street Bridge is a lenticular truss bridge crossing the Monongahela River in Pittsburgh, Pennsylvania, USA.
Pennsylvania Route 576 (PA Turnpike 576), also known as the Southern Beltway, is a tolled freeway in the southern and western suburbs of Pittsburgh, Pennsylvania, United States. It is envisioned to serve as a southern beltway around the Greater Pittsburgh area between Pittsburgh International Airport and the historic Steel Valley of the Monongahela River.
The Homestead Grays Bridge, also known as the (Homestead) High Level Bridge, was built in 1936 and spans the Monongahela River between Homestead Borough and the southernmost tip of Pittsburgh's Squirrel Hill neighborhood. It is notable as the first bridge to incorporate the Wichert Truss, which uses a quadrilateral shape over each support, into its design. This made the truss statically determinate, so that forces in the structural members could be calculated. There are very few surviving Wichert Truss bridges, including one other example in Pittsburgh, the Charles Anderson Memorial Bridge.
U.S. Route 30 (US 30) runs east–west across the southern part of Pennsylvania, passing through Pittsburgh and Philadelphia on its way from the West Virginia state line east to the Benjamin Franklin Bridge over the Delaware River into New Jersey. In Pennsylvania, US 30 runs along or near the transcontinental Lincoln Highway, an auto trail which ran from San Francisco, California, to New York City before the U.S. Routes were designated. However, the Lincoln Highway turned northeast at Philadelphia, using present US 1 and its former alignments to cross the Delaware River into Trenton, New Jersey.
The Mon–Fayette Expressway is a partially-completed tolled freeway that is planned to eventually link Interstate 68 near Morgantown, West Virginia with Interstate 376 near Monroeville, Pennsylvania. The ultimate goal of the highway is to provide a high speed north–south connection between Morgantown and the eastern side of Pittsburgh while revitalizing economically distressed Monongahela River Valley towns in Fayette and Washington counties, serving as an alternative to Interstate 79 to the west, as well as relieving the PA 51 alignment from Pittsburgh to Uniontown.
The Liberty Bridge, completed in 1928, connects downtown Pittsburgh, Pennsylvania, to the Liberty Tunnels and the South Hills neighborhoods beyond. It crosses the Monongahela River and intersects Interstate 579 at its northern terminus.
The Panhandle Bridge carries two rail lines of the Port Authority "T" line across the Monongahela River in Pittsburgh, Pennsylvania. The name comes from Pennsylvania Railroad subsidiary Pittsburgh, Cincinnati, Chicago and St. Louis Railroad, also known as the Panhandle Route, which operated over the bridge.
The Birmingham Bridge is a bowstring arch bridge in Pittsburgh, Pennsylvania, which crosses over the Monongahela River. The bridge connects East Carson Street on the South Side with Fifth and Forbes Avenues going to Uptown, Oakland, and the Hill District. It is named in honor of the English city of Birmingham and also for the neighborhood it connects to, which was once called Birmingham, now a part of the South Side. Many locals also may refer to it with its unofficial name, the 22nd Street bridge.
The Carrie Furnace Hot Metal Bridge is a railroad truss bridge across the Monongahela River between Whitaker, Pennsylvania and Rankin, Pennsylvania. The bridge is out of service and it hasn't seen a train in almost 40 years.
The George Rankin Jr. Memorial Bridge is a cantilever bridge that carries the Green Belt across the Monongahela River between Whitaker and Rankin in Pennsylvania in the USA. It carries four lanes of automobile traffic, plus pedestrian walkways, both paved with concrete. The bridge carries over 22,500 people per day. The bridge and many of its approach ramps were originally built with tram tracks, all of which have since been removed.
Pittsburgh Railways was one of the predecessors of Pittsburgh Regional Transit. It had 666 PCC cars, the third largest fleet in North America. It had 68 streetcar routes, of which only three are used by the Port Authority as light rail routes. With the Port Authority's Transit Development Plan, many route names will be changed to its original, such as the 41D Brookline becoming the 39 Brookline. Many of the streetcar routes have been remembered in the route names of many Port Authority buses.
Pittsburgh, surrounded by rivers and hills, has a unique transportation infrastructure that includes roads, tunnels, bridges, railroads, inclines, bike paths, and stairways.
The Union Railroad is a Class III switching railroad located in Allegheny County in Western Pennsylvania. The company is owned by Transtar, Inc., which is itself a subsidiary of Fortress Transportation and Infrastructure Investors, after being purchased from United States Steel in 1988. The railroad's primary customers are the three plants of the USS Mon Valley Works, the USS Edgar Thomson Steel Works, the USS Irvin Works and the USS Clairton Works.
Interstate 70 (I-70) in the US state of Pennsylvania runs east–west across the southwest part of the state serving the southern fringe of the Pittsburgh metropolitan area. About half of the route is concurrent with I-76 on the Pennsylvania Turnpike, which is a toll road. This is the oldest segment of I-70 in Pennsylvania, having been completed in 1940, and is only one of two segments of I-70 that are tolled, with the other being the Kansas Turnpike. I-70 is one of only a few Interstate Highways to have a traffic signal—in this case, with U.S. Route 30 (US 30) in Breezewood, where it leaves the Pennsylvania Turnpike and heads toward Maryland.
The Pittsburgh Light Rail is a 26.2-mile (42.2 km) light rail system in Pittsburgh, Pennsylvania, and surrounding suburbs. It operates as a deep-level subway in Downtown Pittsburgh, but runs mostly at-grade in the suburbs south of the city. The system is largely linear in a north-south direction, with one terminus near Pittsburgh's central business district and two termini in the South Hills. The system is owned and operated by Pittsburgh Regional Transit. The T is one of the surviving first-generation streetcar systems in North America, with the oldest portions of the network dating back to 1903 and the Pittsburgh Railways. It is also one of only three light rail systems in the United States that continues to use the broad 5 ft 2+1⁄2 in Pennsylvania Trolley Gauge on its lines instead of the 4 ft 8+1⁄2 instandard gauge. In 2022, the system had a ridership of 2,429,500.
The W.D. Mansfield Memorial Bridge, commonly known as the Dravosburg Bridge, is a cantilever bridge that carries vehicular traffic across the Monongahela River between McKeesport, Pennsylvania and Dravosburg, Pennsylvania. It is a high-level bridge, passing over railyard, industrial sites, and Route 837, to connect Fifth Avenue in McKeesport and Richland Avenue in Dravosburg.
PA 885 
