The National Road was the first major improved highway in the United States built by the federal government. Built between 1811 and 1837, the 620-mile (1,000 km) road connected the Potomac and Ohio Rivers and was a main transport path to the West for thousands of settlers. When improved in the 1830s, it became the second U.S. road surfaced with the macadam process pioneered by Scotsman John Loudon McAdam.
Connellsville is a city in Fayette County, Pennsylvania, United States, 36 miles (58 km) southeast of Pittsburgh and 50 miles (80 km) away via the Youghiogheny River, a tributary of the Monongahela River. It is part of the Pittsburgh metropolitan area. The population was 7,031 at the 2020 census.
Smithton is a borough in Westmoreland County, Pennsylvania, United States. The population was 399 at the 2010 census. As of 2018, the population was listed at 378. Smithton has its own post office, with zip code 15479, and is serviced by Yough School District.
U.S. Route 46 (US 46) is an east–west U.S. Highway completely within the state of New Jersey, and runs for 75.34 mi (121.25 km). The west end is at an interchange with Interstate 80 (I-80) and Route 94 in Columbia, Warren County, on the Delaware River. The east end is in the middle of the George Washington Bridge over the Hudson River in Fort Lee, Bergen County, while the route is concurrent with I-95 and US 1-9. Throughout much of its length, US 46 is closely paralleled by I-80. US 46 is a major local and suburban route, with some sections built to or near freeway standards and many other sections arterials with jughandles. The route runs through several communities in the northern part of New Jersey, including Hackettstown, Netcong, Dover, Parsippany-Troy Hills, Wayne, Clifton, Ridgefield Park, Palisades Park, and Fort Lee. It crosses over the Upper Passaic River at several points. The road has been ceremonially named the United Spanish–American War Veterans Memorial Highway.
The Youghiogheny River, or the Yough for short, is a 134-mile-long (216 km) tributary of the Monongahela River in West Virginia, Maryland, and Pennsylvania. It drains an area on the west side of the Allegheny Mountains northward into Pennsylvania, providing a small watershed in extreme western Maryland into the tributaries of the Mississippi River. Youghiogheny is a Lenape word meaning "a stream flowing in a contrary direction".
Interstate 295 (I-295) in Delaware, New Jersey, and Pennsylvania is an auxiliary Interstate Highway, designated as a bypass around Philadelphia, and a partial beltway of Trenton.
U.S. Route 422 (US 422) is a 271-mile-long (436 km) spur route of US 22 split into two segments in the U.S. states of Ohio and Pennsylvania. The western segment of US 422 runs from downtown Cleveland, Ohio, east to Ebensburg, Pennsylvania. The eastern segment, located entirely within Pennsylvania, runs from Hershey east to King of Prussia, near Philadelphia. US 422 Business serves as a business route into each of four towns along the way.
U.S. Route 30 (US 30) is a United States Numbered Highway that 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.
Interstate 70 (I-70) is an Interstate Highway that is located in the Commonwealth of Pennsylvania in the United States. It runs east to west across the southwest part of Pennsylvania and serves the southern fringe of the Pittsburgh metropolitan area.
Pennsylvania Route 51 is a major state highway that is located in Western Pennsylvania in the United States. It runs for 89 miles (143 km) from Uniontown to the Ohio state line near Darlington, where it connects with Ohio State Route 14.
U.S. Route 22 (US 22) is an east–west United States Numbered Highway that stretches from Cincinnati, Ohio, in the west, to Newark, New Jersey, in the east. In Pennsylvania, the route runs for 338.20 miles (544.28 km) between the West Virginia state line in Washington County, where it is a freeway through the western suburbs of Pittsburgh, and then runs east to Easton and the Pennsylvania–New Jersey state line in the Lehigh Valley region of eastern Pennsylvania.
U.S. Route 40 in the U.S. state of Maryland runs from Garrett County in Western Maryland to Cecil County in the state's northeastern corner. With a total length of 221 miles (356 km), it is the longest numbered highway in Maryland. Almost half of the road overlaps or parallels with Interstate 68 (I-68) or I-70, while the old alignment is generally known as US 40 Alternate, US 40 Scenic, or Maryland Route 144. West of Baltimore, in the Piedmont and Appalachian Mountains / Blue Ridge region of the Western Maryland panhandle of the small state, the portions where it does not overlap an Interstate highway are mostly two-lane roads. The portion northeast of Baltimore going toward Wilmington in northern Delaware and Philadelphia in southeastern Pennsylvania is a four-lane divided highway, known as the Pulaski Highway. This section crosses the Susquehanna River at the north end of the Chesapeake Bay on the Thomas J. Hatem Memorial Bridge.
The Youghiogheny River Lake is a flood control reservoir that is located in southwestern Pennsylvania and western Maryland. It is a significant tourist attraction that brings in more than one million visitors a year to the area.
U.S. Route 30 is a U.S. highway running from Philadelphia, Pennsylvania east to Atlantic City, New Jersey. In the U.S. state of New Jersey, US 30 runs 58.26 miles (93.76 km) from the Benjamin Franklin Bridge at the Delaware River in Camden, Camden County, while concurrent with Interstate 676 (I-676), southeast to Virginia Avenue in Atlantic City, Atlantic County. Most of the route in New Jersey is known as the White Horse Pike and is four lanes wide. The road runs through mostly developed areas in Camden County, with surroundings becoming more rural as the road approaches Atlantic County. US 30 runs through several towns including Collingswood, Berlin, Hammonton, Egg Harbor City, and Absecon.
U.S. Route 40 enters Pennsylvania at West Alexander. It closely parallels Interstate 70 (I-70) from West Virginia until it reaches Washington, where it follows Jefferson Avenue and Maiden Street. In Washington, US 40 passes to the south of Washington & Jefferson College. Following Maiden Street out of town, the road turns southeast toward the town of California. A short, limited-access highway in California and West Brownsville provides an approach to the Lane Bane Bridge across the Monongahela River. From here, the road continues southeast to Uniontown.
U.S. Route 119 (US 119) travels through Connellsville, Greensburg, and Punxsutawney, and bypasses Uniontown and Indiana. There are numerous other boroughs and villages along its 133-mile (214 km) route in the Keystone State. The southern entrance of US 119 is at the West Virginia state line one-half-mile south of Point Marion. The northern terminus is at US 219 two miles (3 km) south of DuBois, Pennsylvania. US 119 is in the National Highway System from the West Virginia state line to Exit 0 of PA Turnpike 66, and from US 22 to US 219. From US 22 to US 219, the highway carries the name of the Buffalo-Pittsburgh Highway; from US 22 to PA 56, it is also known as the Patrick J. Stapleton Highway; near Uniontown, it bears the name George C. Marshall Parkway.
The Smithton High-Level Bridge is a structure that crosses the Youghiogheny River between South Huntingdon Township and Rostraver Township.
The Sutersville Bridge is a structure that crosses the Youghiogheny River between Sutersville and Elizabeth Township, Pennsylvania. It connects a rural southeastern corner of Allegheny County with a small Westmoreland County town.
The West Newton Bridge is a structure that crosses the Youghiogheny River between the eastern and western portions of West Newton, Pennsylvania.
US 119 
