Interstate 40 in California
|Defined by S&HC § 340|
|Maintained by Caltrans|
|Length:||154.623 mi (248.842 km)|
|Existed:||August 7, 1947 by FHWA
July 1, 1964 by Caltrans – present
|West end:||I‑15 in Barstow|
|US 95 in Needles|
|East end:||I‑40 at the Arizona state line|
In the State of California, Interstate 40 (I - 40) begins on the west at its interchange with Interstate 15 in Barstow. Sometimes called the Needles Freeway, it is a major east—west highway of the Interstate Highway System that goes all the way to Wilmington, North Carolina. I-40 goes east from 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 of I-40 in California is in San Bernardino County.
This route is part of the California Freeway and Expressway System and is eligible for the State Scenic Highway System. However, it is not a scenic highway as designated by Caltrans. Interstate 40 from Interstate 15 to the Arizona State Line is known as the Needles Freeway, as named by Senate Concurrent Resolution 1 in 1968. Interstate 40 goes through the Mojave Desert on its entire journey through California.
I-40 starts out at a junction with Interstate 15 in Barstow. The freeway passes through Marine Corps Logistics Base Barstow before leaving the city limits. I-40 provides access to the town of Daggett but passes south of the town. After passing south of the Barstow-Daggett Airport, I-40 goes through Newberry Springs and Ludlow before traveling along the south end of Mojave National Preserve. Several miles east of the preserve, I-40 intersects US 95 and the two highways run concurrently into the city of Needles. In Needles, US 95 continues south while I-40 continues east through Mojave National Preserve and across the Colorado River into Arizona.
The maximum speed limit for the entire California segment of Interstate 40 is 70 mph (110 km/h).
The segment of I-40 in California was approved as a chargeable Interstate on July 7, 1947. In 1957, the California Department of Highways proposed that the route be renumbered to Interstate 30 instead because of the already existing U.S. Route 40 in the state. However, this was rejected, and eventually U.S. 40 was decommissioned in favor of Interstate 80.
In the early 1960s, a proposal as part of Operation Plowshare would have detonated 22 nuclear explosions to excavate a massive roadcut through the Bristol Mountains to accommodate a better alignment of Interstate 40 and a new rail line. This proposal was definitively abandoned in 1968.
The State of California submitted the segment of what is now State Route 58 between Barstow and Bakersfield for chargeable Interstate approval twice, in 1956 and 1968, presumably as an extension of Interstate 40, but it was rejected both times. As a result of these rejections, this segment of SR 58 is being upgraded to freeway standards piece-by-piece as Caltrans has funds available. However, there is no current push to apply for Interstate designation.
Needles business loop
The entire route is in San Bernardino County.
|Barstow||0.00||0.00||I‑15 south (Mojave Freeway) to SR 58 west – San Bernardino||Westbound exit and eastbound entrance; west end of I-40|
|0.79||1.27||1||CR 66 west (East Main Street) / I‑15 Bus. to I‑15 south, Montara Road||East Main Street was former US 66 west|
|2.35||3.78||2||Marine Corps Logistics Base Barstow||Former US 66 east|
|4.71||7.58||5||CR 66 east (Nebo Street)||Eastbound exit and westbound entrance|
|Daggett||7.18||11.56||7||A Street – Daggett|
|12.19||19.62||12||Airport Road – Barstow-Daggett Airport|
|Newberry Springs||18.45||29.69||18||CR 66 (National Trails Highway) – Newberry Springs||Former US 66|
|23.33||37.55||23||Fort Cady Road – Newberry Springs|
|28.50||45.87||Desert Oasis Rest Area|
|Ludlow||49.98||80.44||50||CR 66 (Crucero Road) – Ludlow||Former US 66|
|99.73||160.50||100||Essex Road – Essex|
|106.94||172.10||John Wilkie Rest Area - Fenner|
|107.17||172.47||107||Goffs Road – Essex|
|115.19||185.38||115||CR 66 (Mountain Springs Road)||Former US 66|
|132.73||213.61||133||US 95 north – Searchlight, Las Vegas||West end of US 95 overlap; former US 66 west|
|Needles||139.11||223.88||139||River Road Cutoff||Eastbound exit and westbound entrance|
|141.01||226.93||141||I‑40 Bus. east (West Broadway), River Road||West Broadway was former US 66 east|
|142.37||229.12||142||J Street – Downtown Needles|
|143.76||231.36||144||I‑40 Bus. west / US 95 south (East Broadway) – Blythe||East end of US 95 overlap; former US 66|
|148.19||238.49||148||Five Mile Road to US 95 south – Blythe||Former US 66 west|
|153.31||246.73||153||Park Moabi Road|
|154.64||248.87||Arizona state line|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- "California Highways: Interstate Highway Types and the History of California's Interstates". Cahighways.org. Retrieved 2011-11-29.
- "California Highways: Interstate 40". Cahighways.org. Retrieved 2011-11-29.
- Warring, KS (January 8, 2008). "Interstate 40 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. Retrieved 2009-02-05.
- "CA Codes (shc:250-257)". Leginfo.ca.gov. Retrieved 2011-11-29.
- "CA Codes (shc:260-284)". Leginfo.ca.gov. Retrieved 2011-11-29.
- "Officially Designated State Scenic Highways and Historic Parkways". California Department of Transportation. December 7, 2007. Retrieved June 22, 2011.
- 2008 Named Freeways, Highways, Structures and Other Appurtenances in California. Caltrans. p. 74. Retrieved 2011-11-29.
- Thomas Brothers (2008). San Bernardino County Street Atlas (Map).
- Anton, Mike (2007-01-17). "Destiny in the desert". Los Angeles Times. Retrieved 2011-11-29.
- "Project Carryall Marker". Hmdb.org. 2012-01-09. Retrieved 2013-01-25.
- "Preliminary Design Studies In A Nuclear Excavation - Project Carryall - Trb Publications Index". Pubsindex.trb.org. 1994-07-26. Retrieved 2013-01-25.
- "I-40 Barstow, Calif., sign gone for good". Star-News. 2009-11-13. Retrieved 2009-11-13.
|Wikimedia Commons has media related to Interstate 40 in California.|
- Interstate 40 @ Interstate-Guide.com
- Interstate 40 Business @ Interstate-Guide.com
- California @ AARoads.com – Interstate 40
- Caltrans: Interstate 40 highway conditions
- California Highways: Interstate 40