US 70

US 70 is a major east–west United States Numbered Highway that traverses the southern and central United States, connecting Phoenix-area corridors with the Atlantic coast. The route passes through a diverse set of landscapes, linking metropolitan regions such as Las Cruces, El Paso, Oklahoma City, Memphis, Raleigh, and Morehead City. Established in the original 1926 network, the highway interacts with multiple federal, state, and local transportation projects and historic trails.

Route description

The western terminus begins near Holbrook and proceeds eastward through New Mexico corridors including Albuquerque and Clovis before entering Texas near El Paso. In Texas, the alignment parallels Interstate 10 and intersects routes serving Fort Worth-area freight corridors and Dallas–Fort Worth. East of Oklahoma City the route continues through Arkansas via Fort Smith and Little Rock, where it connects to river crossings near Mississippi River approaches. In Tennessee, the highway passes through Memphis and Knoxville, intersecting with corridors toward Nashville and Chattanooga. Proceeding into North Carolina, the route serves Asheville and Greensboro before reaching Raleigh and terminating at the Atlantic port region near Morehead City. Along its course, the highway meets interstates such as Interstate 10, Interstate 40, Interstate 30, Interstate 35, and Interstate 95, forming nodes with regional airports like Sky Harbor International Airport and Memphis International Airport and freight rail corridors operated by Union Pacific Railroad and BNSF Railway.

History

The highway was designated in the original 1926 U.S. Highway plan developed by the American Association of State Highway Officials and reflected earlier auto trails such as the Old Spanish Trail and sections of the Lee Highway. Early pavement projects involved programs administered by the Federal Highway Administration precursor agencies during the Great Depression era, with substantial improvements funded under New Deal agencies including the Works Progress Administration and Civilian Conservation Corps. Mid‑20th century changes paralleled the growth of the Interstate Highway System after the Federal Aid Highway Act of 1956, which shifted long‑distance traffic to routes like Interstate 40 and Interstate 10, producing multiple reroutings and business route designations through cities such as Raleigh, Oklahoma City, and Asheville. Notable historical events along the corridor include Civil War era roads near Shiloh National Military Park and mid‑century flood responses coordinated with the U.S. Army Corps of Engineers after major Mississippi Valley flood events.

Major intersections

Major junctions occur at metropolitan and interstate nodes: - Western terminus: junction with US 60 near Holbrook, connecting to Interstate 17 corridors. - El Paso area: connections with US 85 and Interstate 10. - Oklahoma City: interchanges with Interstate 35, Interstate 40, and Interstate 44; proximity to Will Rogers World Airport. - Little Rock: junction with Interstate 30 and Interstate 40. - Memphis: crossings with Interstate 55 and access to Memphis International Airport. - Knoxville: interchange with Interstate 75 and Interstate 40 split. - Asheville and Greenville areas: links to Interstate 26 and Interstate 95 near the eastern terminus. - Eastern terminus: junction with US 17 near Morehead City and Atlantic Intracoastal Waterway access.

Special and historic alignments

Several segments retain historic designations and alignments: - Business and alternate routes through Raleigh, Glen Jean-style historic districts, and downtown Memphis are preserved as business loops. - Portions coincide with the Old Spanish Trail and remnants of the Lee Highway which are recognized by local historical societies and the National Register of Historic Places listings near historic bridges and early 20th‑century service stations. - The corridor includes several named parkways and memorial highways such as segments designated for veterans and named in honor of figures connected to regional history, with plaques managed by state historic preservation offices and organizations like the National Park Service. - Abandoned or reclassified alignments persist where interstates supplanted the route, leaving preserved roadbeds and historic motels near Route 66-era tourism corridors and rail depots served by Amtrak.

Future and planned changes

Planned upgrades and corridor studies involve collaboration among state departments such as the Arizona Department of Transportation, New Mexico Department of Transportation, Oklahoma Department of Transportation, Tennessee Department of Transportation, and North Carolina Department of Transportation. Projects include capacity improvements near urban centers like Raleigh and El Paso, interchange reconstructions at Interstate 40 interchanges, and multimodal investments linking to Federal Railroad Administration grant programs and U.S. Department of Transportation initiatives. Environmental assessments reference agencies including the Environmental Protection Agency and consultations with the National Park Service when projects affect historic alignments. Long‑range planning discusses potential reclassification of segments to state routes, business spur consolidations, and resilience projects addressing floodplain management coordinated with the U.S. Army Corps of Engineers.

Category:United States Numbered Highways