U.S. Route 40 (National Pike)

U.S. Route 40 (National Pike) is a cross‑continental highway in the United States that traces historic corridors of east–west travel from the Pacific Coast to the Atlantic Seaboard, linking major urban centers, industrial regions, and early federal routes. The road follows or parallels sections of the National Road, Lincoln Highway, Historic Route 66 corridors, and portions of the Interstate Highway System while intersecting numerous historic towns, rivers, and transportation hubs across multiple states. U.S. 40 has been integral to westward migration, industrial distribution, and 20th‑century automotive culture.

Route description

U.S. 40 begins in San Francisco, California near the terminus of Interstate 80 and proceeds east through Oakland, California, crosses the San Francisco–Oakland Bay Bridge, and follows urban and suburban arterials through Berkeley, California, Richmond, California, and El Cerrito, California before entering Contra Costa County, California. The route continues through the Sierra Nevada corridor near Truckee, California and Donner Pass, paralleling Interstate 80 (West) into Reno, Nevada and Sparks, Nevada, then crosses the Great Salt Lake Desert region adjacent to Salt Lake City, Utah and Promontory Summit. Entering Colorado, U.S. 40 serves Denver, Colorado and follows the Front Range corridor past Fort Collins, Colorado and Greeley, Colorado into the Great Plains and Kansas, connecting Topeka, Kansas and Lawrence, Kansas. The highway traverses Missouri through Kansas City, Missouri and St. Louis, Missouri, ties into historic ferries and bridges across the Mississippi River, and proceeds into Illinois serving East St. Louis, Illinois, Effingham, Illinois, and Indianapolis, Indiana in Marion County, Indiana. In Ohio U.S. 40 follows the National Road corridor through Dayton, Ohio and Columbus, Ohio before entering the Appalachian Plateau and crossing into West Virginia at Wheeling, West Virginia. The route in Pennsylvania passes through Pittsburgh, Pennsylvania, skirts the Allegheny National Forest, and continues through Cumberland, Maryland where the corridor is explicitly called the National Road. From Baltimore, Maryland the highway extends into Delaware via Wilmington, Delaware and terminates on the East Coast in Atlantic City, New Jersey after passing through Philadelphia, Pennsylvania and connecting to Camden, New Jersey via crossings of the Delaware River.

History

The corridor that U.S. 40 occupies incorporates the early 19th‑century National Road authorized under President James Monroe and constructed during the administrations of James Madison and John Quincy Adams, which reached Cumberland, Maryland and later extended westward to Zanesville, Ohio and beyond. In the 20th century, the route was designated as part of the original 1926 U.S. Numbered Highway System influenced by planners such as Thomas H. MacDonald of the U.S. Bureau of Public Roads and tied to transcontinental auto trails like the Lincoln Highway and the Victory Highway. U.S. 40 was realigned and superseded in many stretches by Interstate 70, Interstate 80, and Interstate 76 during the mid‑20th century under the direction of the Federal Aid Highway Act of 1956, leading to bypasses of towns such as Cumberland, Maryland and Columbus, Ohio. The route has witnessed pivotal events including troop movements during the American Civil War in the border states, industrial expansion in the Rust Belt centering on Pittsburgh, Pennsylvania and Cleveland, Ohio, and mid‑century cultural developments such as the rise of automobile tourism epitomized by roadside motels and diners in towns like Flagstaff, Arizona and Columbus, Ohio. Preservation efforts by organizations such as the National Trust for Historic Preservation and state historical societies have sought to maintain segments associated with the National Road and early 20th‑century highway architecture.

Major intersections

U.S. 40 intersects numerous major routes and crossings: western termini at Interstate 80 (California–Nevada) near San Francisco Bay Area, crossings with Interstate 580 (California), junctions with U.S. Route 95 in Nevada, concurrency with Interstate 80 (Nevada) near Reno, Nevada, connection to Interstate 15 via feeder routes near Salt Lake City, Utah, overlap with Interstate 70 in Colorado and Kansas, major interchanges with Interstate 435 in Kansas City, Missouri, the Gateway Arch area and junctions with Interstate 55 and Interstate 64 in St. Louis, Missouri, intersections with U.S. Route 51 and Interstate 57 in Illinois, passage through Indianapolis intersecting Interstate 65 and Interstate 70 (Indiana), crossings of Interstate 75 near Dayton, Ohio and Interstate 71 near Columbus, Ohio, connection to Interstate 77 and Interstate 79 in West Virginia and Pennsylvania, links with Interstate 68 in Cumberland, Maryland, access to Interstate 95 and Baltimore Beltway in Baltimore, Maryland, junctions with U.S. Route 13 and Delaware Route 1 in Delaware, and eastern approaches that connect to U.S. Route 30 and the Atlantic City Expressway in New Jersey.

Related historic and cultural sites

The highway corridor provides access to the Golden Gate Bridge, Lake Tahoe, Donner Pass, Promontory Summit, the Rocky Mountains, Garden of the Gods (Colorado Springs), Fort Laramie National Historic Site, Santa Fe Trail landmarks, Union Station (Denver, Colorado), Harry S. Truman National Historic Site proximities, Lincoln Home National Historic Site associations, the National Road (Cumberland to Vandalia) including the Cumberland Narrows, Grave Creek Mound Archaeological Complex, Fallingwater (nearby in Pennsylvania), the National Civil War Museum in Harrisburg, Pennsylvania region, the National Road-Zane Grey Museum influence in Ohio, the Fort Necessity National Battlefield corridor influences, Gettysburg National Military Park proximate travel routes, Independence Hall access via Philadelphia, Ellis Island/Statue of Liberty approaches from the northeast terminus region, and numerous Route 40‑era diners, motels, service stations, and neon signs recognized by the Historic American Engineering Record and local preservation commissions.

Transportation and maintenance

Maintenance responsibilities for U.S. 40 are divided among state departments such as the California Department of Transportation, Nevada Department of Transportation, Utah Department of Transportation, Colorado Department of Transportation, Kansas Department of Transportation, Missouri Department of Transportation, Illinois Department of Transportation, Indiana Department of Transportation, Ohio Department of Transportation, West Virginia Division of Highways, Pennsylvania Department of Transportation, Maryland State Highway Administration, Delaware Department of Transportation, and the New Jersey Department of Transportation. Federal oversight and funding have involved the Federal Highway Administration and funding programs under successive federal statutes including implementations following the Federal Aid Highway Act of 1956. Corridor management addresses issues such as pavement rehabilitation, bridge replacement projects over the Mississippi River and Delaware River, seasonal snow removal in the Sierra Nevada and Rocky Mountains, traffic operations integration with regional metropolitan planning organizations like the Metropolitan Transportation Commission (San Francisco Bay Area), Regional Transportation Commission of Southern Nevada, and pavement safety upgrades complying with Manual on Uniform Traffic Control Devices standards. Preservation of historic segments coordinates with the National Park Service, state historic preservation offices, and non‑profit groups to balance modern traffic demands with cultural resource protection.

Category:U.S. Highways Category:Historic roads in the United States