page_title: U.S. Route 20
section_title: Pennsylvania
hierarchical_section_title: U.S. Route 20 / Route description / Pennsylvania
caption_attribution_description: English: The northbound Interstate 79 Exit 182, Exit 183, and I-79's northern terminus in Erie, Pennsylvania.
context_page_description: U.S. Route 20 or U.S. Highway 20 is an east–west United States highway that stretches from the Pacific Northwest all the way to New England. The "0" in its route number indicates that US 20 is a coast-to-coast route and major route. Spanning 3,365 miles, it is the longest road in the United States, and the route is roughly parallel to that of the newer Interstate 90, which is in turn the longest Interstate Highway in the U.S. There is a discontinuity in the official designation of US 20 through Yellowstone National Park, with unnumbered roads used to traverse the park.
  US 20 and US 30 break the general U.S. Route numbering rules in Oregon, since US 30 actually starts north of US 20 in Astoria, and runs parallel to the north throughout the state. The two run concurrently and continue in the correct positioning near Caldwell, Idaho. This is because US 20 was not a planned coast-to-coast route while US 30 was. US 20 originally ended at the eastern entrance of Yellowstone Park; it was extended in 1940.
  The highway's eastern terminus is in Boston, Massachusetts, at Kenmore Square, where it meets Route 2.
context_section_description: US 20 runs for nearly 50 miles (80 km) across Erie County, Pennsylvania, most of that time just south of the CSX/Amtrak railroad tracks. US 20 appears as West Ridge Road eastward from the Ohio border through Springfield, Girard, Fairview and Millcreek townships. At the intersection with Pennsylvania Route 832, just outside the Erie city limits, it becomes West 26th Street. After it reaches city center at the intersection with State Street, it becomes East 26th Street. It turns sharply northward as Broad Street at the Bayfront Connector, then turns east again as Buffalo Road through Wesleyville and Harborcreek Township. Buffalo Road turns sharply northward at the town of Harborcreek. US 20 intersects with Pennsylvania Route 955 and resumes its eastward journey. At North East Township, US 20 becomes West Main Road. Within the town limits, it becomes West Main Street until it reaches the town center at its intersection with Pennsylvania Route 89, where it becomes East Main Street. Outside the town limits it becomes East Main Road until it reaches Pennsylvania's border with New York.
caption: I-79 at US 20 (exit 182) in Erie, Pennsylvania
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