.svg) Interstate 40 | ||||
|---|---|---|---|---|
| Needles Freeway | ||||
 I-40 highlighted in red | ||||
| Route information | ||||
| Maintained by Caltrans | ||||
| Length | 154.64 mi[1] (248.87 km) | |||
| Existed | 1964–present | |||
| NHS | Entire route | |||
| Major junctions | ||||
| West end |  I-15 in Barstow | |||
 US 95 in Needles | ||||
| East end |  I-40 at the Arizona state line near Topock, AZ | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | San Bernardino | |||
| Highway system | ||||
| ||||
Interstate 40 (I-40) is a major east–west Interstate Highway in the United States, stretching from Barstow, California, to Wilmington, North Carolina. The segment of I-40 in California is sometimes called the Needles Freeway. It passes through the eastern fringe of the Inland Empire metropolitan area, going east from its western terminus at I-15 in Barstow across the Mojave Desert in San Bernardino County past the Clipper Mountains to Needles, before it crosses over the Colorado River into Arizona east of Needles. All 155 miles (249 km) of I-40 in California are in San Bernardino County.