Definition
U.S. Route 466 (US 466) was a former United States Numbered Highway that existed from 1933 until its decommissioning in 1971. It functioned as a spur of U.S. Route 66, connecting the Mojave Desert region of California with the Arizona‑Nevada border near King Kingman.
Overview
US 466 was established in 1933 as part of the expanding U.S. Highway System. The route began at an intersection with US 66 in Barstow, California, and proceeded eastward through the Mojave Desert, crossing the Colorado River near Hoover Dam, and passing through the city of Las Vegas, Nevada. Its eastern terminus was at US 93 near Kingman, Arizona. The highway traversed a mixture of desert terrain, mountainous sections near the Spring Mountains, and urban corridors within Las Vegas. In 1971, the designation was removed; the former alignment was absorbed into state highway systems (e.g., California State Route 58, Nevada State Route 146, and Arizona State Route 93) and, in part, the Interstate 15 corridor.
Etymology / Origin
The number “466” follows the U.S. Highway numbering convention in which three‑digit routes are typically spurs or branches of a primary two‑digit route. The “466” designation indicates that the highway was a spur of US 66, the historic “Mother Road.” The assignment of the specific “4” as the first digit was part of the systematic allocation of available three‑digit numbers at the time of creation.
Characteristics
- Length: Approximately 150 mi (240 km) at the time of its greatest extent.
- Route composition: The highway combined newly constructed roadway with existing state and local roads; sections were paved with asphalt or concrete, while early segments in the 1930s remained gravel.
- Key junctions:
- Barstow, CA – junction with US 66 (western terminus).
- Baker, CA – access to the original Hoover Dam.
- Boulder City, NV – connection to US 93.
- Las Vegas, NV – concurrency with US 95 for a portion of its urban segment.
- Kingman, AZ – junction with US 93 (eastern terminus).
- Historical significance: US 466 provided a direct automobile link between the Southern California desert and the emerging Las Vegas metropolitan area, facilitating tourism to the Hoover Dam and early development of the Nevada gaming corridor.
Related Topics
- U.S. Route 66 – the primary highway of which US 466 was a spur.
- Hoover Dam – a major landmark accessed via US 466.
- Interstate 15 – the modern interstate that now serves much of the former US 466 corridor between Barstow and Las Vegas.
- Nevada State Route 146 and California State Route 58 – present‑day state highways that incorporate portions of the former US 466 alignment.
- Decommissioned United States Numbered Highways – the broader category of U.S. highways removed from the system, of which US 466 is an example.