Interstate 10 in California
|Maintained by Caltrans|
|Length||243.31 mi (391.57 km)|
|Existed||August 7, 1947 by FHWA|
July 1, 1964 by Caltrans–present
|West end||SR 1 in Santa Monica|
|East end||I-10 / US 95 at Arizona state line in Ehrenberg, AZ|
|Counties||Los Angeles, San Bernardino, Riverside|
Interstate 10 (I-10) is a transcontinental Interstate Highway in the United States, stretching from Santa Monica, California to Jacksonville, Florida. The segment of I-10 in California runs east from Santa Monica through Los Angeles, San Bernardino, and Palm Springs before crossing into the state of Arizona. In the Greater Los Angeles area, it is known as the Santa Monica Freeway and the San Bernardino Freeway, linked by a short concurrency on I-5 (Golden State Freeway) at the East Los Angeles Interchange. I-10 also has parts designated as the Rosa Parks Freeway and the Sonny Bono Memorial Freeway. Some parts were also formerly designated as the Christopher Columbus Transcontinental Highway. However, the California State Legislature removed this designation following the passage of a bill on August 31, 2022. I-10 is also known colloquially as "the 10" to Southern California residents .
The California Streets and Highways Code defines Route 10 from:
(a) Route 1 in Santa Monica to Route 5 near Seventh Street in Los Angeles.
(b) Route 101 near Mission Road in Los Angeles to the Arizona state line at the Colorado River via the vicinity of Monterey Park, Pomona, Colton, Indio, and Chiriaco Summit and via Blythe.
Despite the legislative definition, Caltrans connects the two sections of the route by cosigning I-10 down I-5 between the East LA Interchange and the Santa Monica Freeway, negating a section of the San Bernardino Freeway west of I-5. This short section of Route 10 between Route 5 and Route 101, which was formerly defined as Route 110 (signed as I-110) until 1968, is signed overhead for I-10 eastbound and for U.S. Route 101 (US 101) westbound. This I-5/I-10 cosigning is consistent with the Federal Highway Administration's (FHWA) Interstate Highway route logs that such an overlap exists for the segment of I-10 in California.
I-10 is part of the California Freeway and Expressway System, and is part of the National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the FHWA. I-10 is eligible to be included in the State Scenic Highway System, but it is not officially designated as a scenic highway by the California Department of Transportation (Caltrans). The Santa Monica Freeway is Route 10 from Route 1 to Route 5, as named by the State Highway Commission on April 25, 1957. The section between the Harbor (I-110) and San Diego (I-405) freeways is also signed as the Rosa Parks Freeway, after the African American civil rights activist. The I-10 freeway is signed as the Christopher Columbus Transcontinental Highway in Santa Monica. However, the removal of this designation may result in the eventual removal of this signage.
Santa Monica Freeway
The Santa Monica Freeway is the westernmost segment of I-10, beginning at the east end of the McClure Tunnel in Santa Monica and ending southeast of downtown Los Angeles at the East Los Angeles Interchange.
I-10 begins its eastward journey in the city of Santa Monica after SR 1 turns east through the McClure Tunnel. Note that the McClure Tunnel is part of SR 1 in its entirety, and the western terminus of I-10 is to the east of the tunnel at 4th Street. SR 1 then exits onto Lincoln Boulevard and heads south while I-10 continues east. Soon after it enters the city of Los Angeles, I-10 has a four-level interchange with I-405. I-10 then continues through Sawtelle, Rancho Park, Cheviot Hills, Beverlywood, and Crestview in West Los Angeles; Lafayette Square and Wellington Square in Mid-City; and Arlington Heights, West Adams, and Jefferson Park into downtown Los Angeles. On the western edge of downtown at the Dosan Ahn Chang Ho Memorial Interchange, I-10 has an interchange with I-110 to the south and SR 110 to the north. I-10 then travels along the southern edge of downtown to the East Los Angeles Interchange.
At the East Los Angeles Interchange, SR 60 diverges east towards Riverside and Pomona. I-10 then turns north, running concurrently with I-5 for approximately 1.5 miles (2.4 km). Then, I-10 heads east and merges with the traffic from the spur to US 101 onto the San Bernardino Freeway.
The freeway is 14 lanes wide (two local and five express lanes in each direction) from the Harbor Freeway (I-110) interchange to the Arlington Avenue off-ramp. Most of these lanes are full at peak travel times (even on Saturdays). The remainder of the freeway varies between eight and 10 lanes in width. The whole freeway opened in 1965 with four to six lanes, with a formal dedication held in 1966.
While the construction of the Century Freeway several miles to the south reduced traffic congestion to a considerable amount by creating an alternate route from downtown to the Los Angeles International Airport, the Santa Monica Freeway is still one of the busiest freeways in the world. All three freeway-to-freeway interchanges along its length are notorious for their congestion, and are routinely ranked among the top 10 most congested spots in the United States.
Due to the high traffic volume, car accidents are so common that Caltrans has constructed special accident investigation sites separated from the freeway by fences. These enable the California Highway Patrol to quickly clear accidents from the through traffic lanes, and the fences reduce congestion by preventing rubbernecking (in which vehicles slow down so their occupants can watch the accident investigation).
The Santa Monica Freeway is considered the border between West Los Angeles and South Los Angeles. Part of the freeway also skims the Byzantine-Latino Quarter, which is home to many immigrants affiliated with the Eastern Orthodox Church.
San Bernardino Freeway
I-10 heads east from the Downtown Los Angeles Eastside Los Angeles region to I-710 in Monterey Park. It then continues Alhambra, Rosemead, San Gabriel, El Monte, and Baldwin Park before intersecting with I-605. It then travels through West Covina and Covina before heading up Kellogg Hill into San Dimas, where I-10 intersects with SR 57 (formerly part of I-210) and SR 71 at the Kellogg Interchange. I-10 then heads east through Pomona and Claremont, leaving Los Angeles County to enter San Bernardino County.
In San Bernardino County, I-10 travels through Montclair, Upland, and Ontario, providing access to Ontario International Airport. I-10 then has a four-level interchange with I-15 before traveling through Fontana, Rialto, and Colton. I-10 then intersects with I-215, where the San Bernardino Freeway ends, before briefly entering San Bernardino city proper and traveling through Loma Linda and Redlands. In Redlands, I-10 intersects with the SR 210 freeway (future I-210) and with SR 38 before entering Yucaipa and eventually Riverside County.
In Riverside County, I-10 goes through Calimesa before entering Beaumont and merging with the eastern end of SR 60 (itself formerly the California segment of US 60). In Banning, I-10 has a diamond intersection with SR 243 before passing through San Gorgonio Pass between the San Bernardino Mountains and the San Jacinto Mountains (where the vegetation makes a rapid change between Mediterranean and desert ecology) and entering Palm Springs. The next 35 miles (56 km) of the freeway, between SR 111 and Dillon Road, was named the Sonny Bono Memorial Freeway in 2002. Although I-10 intersects with the northern terminus of SR 111, the major artery to Palm Springs, it mostly bypasses the city, then connects to SR 62, a major east–west route through the Mojave Desert. I-10 cuts through Cathedral City and passes just outside the northern city limits of Rancho Mirage, Palm Desert, and La Quinta before entering Indio. I-10 then has an interchange in Coachella with the northern end of the SR 86 expressway, which also leads to SR 111.
Several miles east and roughly halfway between Indio and Blythe, in the community of Desert Center, I-10 intersects with SR 177, a turnoff that leads to the Desert Center Airport and connects to SR 62. Three miles (4.8 km) south of I-10 at the Wiley's Well exit, between Desert Center and Blythe, are the Chuckawalla Valley and Ironwood State Prisons. Near the Arizona state line, I-10 meets the terminus of SR 78. In the city of Blythe, I-10 runs concurrently with US 95 as both routes cross the Colorado River into Arizona.
The speed limit on the entire Riverside County segment of I-10 is 70 mph (110 km/h). I-10 westbound is usually signed as towards San Bernardino and/or Los Angeles in the Mojave Desert. Eastbound, in the San Gorgonio Pass, the signage indicates "Indio, Other Desert Cities", and indicates "Blythe" after Indio; the first sign for Phoenix does not occur until Indio.
The El Monte Busway is a grade-separated, shared-use express bus and high-occupancy toll (HOT) corridor running along the San Bernardino Freeway between Alameda Street near Union Station in Downtown Los Angeles and a point west of I-605 in El Monte. From Alameda Street to I-710, the El Monte Busway runs parallel to the north side of the freeway. After the I-710 interchange, these lanes merge back to the median of I-10. Eastbound buses exit the HOT lanes at El Monte Station west of I-605. Each vehicle using the HOT lanes is required to carry a FasTrak Flex transponder, with its switch set to indicate the number of the vehicle's occupants (1, 2, or 3 or more), regardless of whether they qualify for free.
Plans are to extend the HOT lanes from I-605 to Ford Street in Redlands. This expansion is planned in four phases. As of 2022[update], the proposed segment in Los Angeles County between I-605 and the San Bernardino County line is under environmental review, the segment in San Bernardino County between the county line and Etiwanda Avenue at the Ontario–Fontana city limit is scheduled to be completed in 2023, the section to Pepper Avenue in Colton is planned to break ground in 2024, and the segment to Ford Street in Redlands is still in the planning stage.
What is now I-10 east of Los Angeles was generally part of the Atlantic and Pacific Highway, one of many transcontinental national auto trails. By 1926, when the United States Numbered Highways were assigned, the road across the desert east of Indio was unimproved, while the road from Indio west to San Bernardino (as well as various roads west to Los Angeles) was paved. In late 1926, US 99 was designated along the section of road from San Bernardino to Indio, where it turned south along present SR 86 on the west side of the Salton Sea. West of San Bernardino, US 99 ran to Los Angeles, concurrent with US 66 (via Pasadena) before turning north; this route to Los Angeles is north of the later alignment of I-10. The piece of this between San Bernardino and Indio was defined in 1915 as Legislative Route 26. (It continued south from Indio via El Centro to Heber. A 1931 extension took it south to Calexico on present SR 111.)
The route from Indio via Mecca to the Arizona state line near Blythe was defined in 1919 as pre-1964 Legislative Route 64. (Later extensions took LR 64 west along present SR 74; a 1931 cutoff bypassed Mecca to the north.) LR 26 was extended west from San Bernardino to Los Angeles in 1931, running along an alignment south of the existing US 66/US 99. Neither of these was a signed route until around 1932, when US 60 was extended west from Arizona to Los Angeles, running along LR 64 to Indio, LR 26 (with US 99) to Beaumont, pre-1964 Legislative Route 19 to Pomona, and LR 26 to Los Angeles. (The original alignment of LR 26 ran roughly where SR 60 now is west of Pomona, but an alignment close to present I-10 opened around 1934).
Thus, in 1931, what is now I-10 east of Los Angeles had been defined as LR 26 from Los Angeles to Indio and LR 64 from Indio to Arizona. It was signed as US 99 from San Bernardino to Indio, and US 60 came along around 1932 from Los Angeles to Pomona and from Beaumont to Arizona. US 70 was extended west from Arizona c. 1936 along the whole route to Los Angeles, and, between 1933 and 1942, US 99 moved from US 66 to present I-10 between San Bernardino and Los Angeles, forming a three-way concurrency between Pomona and Los Angeles. Old alignments and names include Valley Boulevard, Ramona Boulevard, and Garvey Avenue.
I-10 holds the distinction of being the first freeway in Los Angeles. A four-mile (6.4 km) section of today's freeway was built between 1933 and 1935 at a cost of $877,000 (equivalent to $13.8 million in 2021). The "Ramona Boulevard" highway linked downtown Los Angeles to the communities of the southern San Gabriel Valley. The roadway, which opened on April 20, 1935, was dubbed the "Air Line route", and was seen as a major achievement in traffic design.
The route east from Los Angeles was added to the Interstate Highway System on August 7, 1957. It was assigned the I-10 number on August 14, 1957, and the short piece west of I-5 was approved as I-110 on November 10, 1958. By then, most if not all of the San Bernardino Freeway had been completed, and I-10 was signed along the existing freeway along with US 70, US 99, and part of US 60. US 70 and US 99 were removed in the 1964 renumbering, while US 60 was removed in 1972, leaving only I-10.
The part west of downtown Los Angeles was pre-1964 Legislative Route 173, defined in 1933 from Santa Monica to downtown Los Angeles. It was signed as SR 26 by 1942, running primarily Olympic Boulevard. It was later replaced by the Santa Monica Freeway, and added to the Interstate Highway System on September 15, 1955. It too was assigned the I-10 number on August 14, 1957. It was completed c. 1964, and became Route 10 in the 1964 renumbering.
Portions of the Santa Monica Freeway going over La Cienega Boulevard collapsed after the Northridge earthquake on January 17, 1994, and were rebuilt using new Seismic-Resistant bridge designs.
The El Monte Busway was converted to high occupancy toll (HOT) lanes in 2013 as part of the Metro ExpressLanes project.
On July 19, 2015, a bridge carrying the eastbound lanes of I-10 near Desert Center collapsed from floodwater from the remnants of Hurricane Dolores, trapping a vehicle.
Juan Bautista de Anza National Historic Trail
The I-10 is part of the auto tour route of the Juan Bautista de Anza National Historic Trail, a National Park Service unit in the United States National Historic Trail and National Millennium Trail programs. In 2005, Caltrans began posting signs on roads that overlap with the historic 1776 Juan Bautista de Anza trail route, so that California drivers can now follow the trail.
|Los Angeles||Santa Monica||0.00||0.00||—|
SR 1 north (Pacific Coast Highway) – Oxnard
|Western end of SR 1 concurrency; former US 101 Alternate; western end of Santa Monica Freeway|
|1A||4th Street / 5th Street||Westbound exit and eastbound entrance|
Lincoln Boulevard to SR 1 south
|Eastern end of SR 1 concurrency; signed as exit 1A eastbound; former SR 2 / US 66 / US 101 Alternate|
|20th Street||Eastbound exit and westbound entrance|
|2.08||3.35||1C||Cloverfield Boulevard||Westbound exit and eastbound entrance|
|2.30||3.70||2A||Centinela Avenue||Signed as exit 2 eastbound|
|Los Angeles||2.35||3.78||2B-C||Bundy Drive||Westbound exits and eastbound entrance; signed as exits 2B (south) and 2C (north)|
|3||I-405 – Sacramento, LAX Airport, Long Beach||Signed as exits 3A (north) and 3B (south); former SR 7; exit 53B on I-405|
|4.24||6.82||4||Overland Avenue / National Boulevard||No westbound signage for National Boulevard|
|5.05||8.13||5||National Boulevard||Westbound exit and eastbound entrance|
|5.76||9.27||6||Robertson Boulevard – Culver City|
|6.81||10.96||7A||SR 187 (Venice Boulevard) / La Cienega Boulevard||Venice Boulevard / SR 187 only signed westbound|
|7.00||11.27||7B||Fairfax Avenue / Washington Boulevard|
|8.27||13.31||8||La Brea Avenue|
|12||Normandie Avenue||Signed as exit 11 westbound|
|Vermont Avenue / Hoover Street|
I-110 south / SR 110 north / Pico Boulevard – San Pedro, Pasadena, Downtown, Convention Center
|Dosan Ahn Chang Ho Memorial Interchange; signed as exits 13A (south) and 13B (north) eastbound; exit 21 on I-110 / SR 110 / Harbor Freeway|
|13C||Grand Avenue||No westbound exit|
|13.64||21.95||14A||Maple Avenue||Eastbound exit and westbound entrance|
|Los Angeles Street – Convention Center||Westbound exit and eastbound entrance|
|14.22||22.88||14B||San Pedro Street||No westbound entrance|
|15.55||25.03||16A||Mateo Street / Santa Fe Avenue|
SR 60 east – Pomona
|Eastbound exit and westbound entrance; western end of East Los Angeles Interchange; exit 1A on SR 60|
I-5 south – Santa Ana
|—||Boyle Avenue||Eastbound exit only|
I-5 south / Soto Street – Santa Ana
|Western end of I-5 overlap; eastern end of East Los Angeles Interchange proper; westbound exit and eastbound entrance; eastern end of Santa Monica Freeway; exit 1E on SR 60|
SR 60 east – Pomona
|135B[a]||Cesar Chavez Avenue||Eastbound exit and westbound entrance; formerly Brooklyn Avenue|
|19A||State Street||Westbound exit and eastbound entrance|
I-5 north – Sacramento
|Eastern end of I-5 overlap; 5-10 Split portion of the East Los Angeles Interchange; exit 135B-C on I-5|
US 101 north – Los Angeles
|Westbound left exit and eastbound entrance; access via Spur to US 101 and to the San Bernardino Split|
|19C||Soto Street||No eastbound entrance; signed as exit 19 eastbound|
|—||Marengo Street||Eastbound entrance only|
|East Los Angeles||19.59||31.53||20A||City Terrace Drive||Eastbound exit and westbound entrance|
|20.24||32.57||20B||Eastern Avenue||Westbound access is part of the I-710 exit; serves CSU Los Angeles|
|Monterey Park||20.77||33.43||21||I-710 (Long Beach Freeway) / Valley Boulevard – Long Beach||Eastbound exit and westbound entrance also include ramps to/from Ramona Road; I-710 exit 22 northbound, 22A-B southbound|
El Monte Busway west to US 101 north / Alameda Street
|Express Lanes access only; westbound exit and eastbound entrance|
|—||I-10 LA Metro Express Lanes||First westernmost access point from mainline I-10|
|21.70||34.92||22||Fremont Avenue – South Pasadena|
|22.72||36.56||23A||Atlantic Boulevard – Monterey Park|
Monterey Park tripoint
|San Gabriel–Rosemead line||24.72||39.78||—||Del Mar Avenue||Express Lanes access only; eastbound exit and westbound entrance|
|25A||Del Mar Avenue||Previously exit 25B|
|25.23||40.60||25B||San Gabriel Boulevard|
|Rosemead||25.73||41.41||26A||Walnut Grove Avenue|
|Rosemead–El Monte line||26.25||42.25||26B||SR 19 (Rosemead Boulevard) – Pasadena||Includes access to/from Flair Drive eastbound|
|27.35||44.02||27||Temple City Boulevard||Westbound signage; previously exit 28|
|Baldwin Avenue||Eastbound signage|
|—||El Monte Busway east to El Monte Station||Buses only via Express Lanes; eastbound exit and westbound entrance|
|El Monte||28.06||45.16||28||Santa Anita Avenue||Previously exit 29|
|28.89||46.49||29A||Peck Road South|
|29B||Peck Road North, Valley Boulevard||Westbound exits signed as 29B (Valley Boulevard) and 29C (Peck Road North)|
|—||I-10 LA Metro Express Lanes||Eastern end of Express Lanes|
|—||I-10 LA Metro Express Lanes (eastern expansion)||Western end of proposed expansion|
|29.97||48.23||30||Garvey Avenue, Durfee Avenue||Westbound exit and eastbound entrance|
|31A||I-605 (San Gabriel River Freeway)||Eastbound exits signed as 31A (south) and 31B (north); I-605 exit 22|
|30.93||49.78||31B||Frazier Street||Signed as exit 31C eastbound; no eastbound entrance|
|31.61||50.87||32A||Baldwin Park Boulevard|
|32.05||51.58||32B||Francisquito Avenue – La Puente||No eastbound entrance; previously exit 33A|
|32.74||52.69||33||Puente Avenue – Industry|
|West Covina||33.85||54.48||34A||Pacific Avenue, West Covina Parkway||Signed as exit 34 eastbound|
|34.24||55.10||34B||Sunset Avenue||Westbound exit only|
|35.89||57.76||36||SR 39 (Azusa Avenue)|
|West Covina–Covina line||38.39||61.78||38B||Holt Avenue|
|Covina–San Dimas line||39.85||64.13||40||Via Verde|
|Pomona||41.41||66.64||41||Kellogg Drive||No eastbound entrance; serves Cal Poly Pomona|
|Pomona–San Dimas line||41.83||67.32||42A|
SR 57 (Orange Freeway) to I-210 (Foothill Freeway) – Santa Ana
|Western end of Kellogg Interchange; signed as exit 42 westbound; SR 57 north is former I-210; SR 57 exit 21 northbound, 22A-B southbound|
SR 71 south (Chino Valley Freeway) / Campus Drive – Corona
|Eastern end of Kellogg Interchange; westbound access is via exit 44; SR 71 exit 15|
|Pomona||43.05||69.28||43||Fairplex Drive||Formerly Ganesha Boulevard; westbound exit is part of exit 44; serves Los Angeles County Fair|
|44.67||71.89||45A||White Avenue||Westbound access is via exit 45; previously exit 45|
|45.12||72.61||45B||Garey Avenue, Orange Grove Avenue||Signed as exit 45 westbound; Orange Grove Avenue not signed eastbound|
|Claremont||47.13||75.85||47||Indian Hill Boulevard|
|Los Angeles–San Bernardino|
|Claremont–Montclair line||—||I-10 LA Metro Express Lanes (eastern expansion)||Western end of proposed expansion|
|—||I-10 San Bernardino Express Lanes (Phase 1)||Western end of express lane-under construction; scheduled to open in 2023|
|San Bernardino||Montclair||48.34||77.80||48||Monte Vista Avenue|
|Ontario–Upland line||50.03||80.52||50||Mountain Avenue – Mount Baldy|
|51.13||82.29||51||SR 83 (Euclid Avenue) – Ontario, Upland|
|54.82||88.22||55A||Holt Boulevard||Eastbound access is via exit 54; former US 99 north|
|55B||Archibald Avenue – Ontario Airport||Single-point urban interchange, signed as exit 55 eastbound|
|57.60||92.70||58||I-15 (Ontario Freeway) – Corona, San Diego, Barstow, Las Vegas||Signed as exits 58A (north) and 58B (south) eastbound; I-15 exit 109 northbound, 109A-B southbound|
|Ontario–Fontana line||58.79||94.61||59||Etiwanda Avenue, Valley Boulevard||Valley Boulevard was former US 99 south|
|—||I-10 San Bernardino Express Lanes (Phase 1)||Eastern end of express lane-under construction; scheduled to open in 2023|
|—||I-10 San Bernardino Express Lanes (eastern expansion)||Western end of proposed expansion|
|63.88||102.80||64||Sierra Avenue||Single-point urban interchange|
|Bloomington||66.15||106.46||66||Cedar Avenue – Bloomington|
|70.28||113.10||70B||9th Street – Downtown Colton|
|70.91||114.12||71||Mt. Vernon Avenue|
|71.90||115.71||72||I-215 – San Bernardino, Barstow, Riverside||Former I-15E / US 91 / US 395; eastern end of San Bernardino Freeway; I-215 exit 40A-B northbound, 40 southbound|
|San Bernardino||72.92||117.35||73||Waterman Avenue||Signed as exits 73A (south) and 73B (north) eastbound|
|San Bernardino–Loma Linda line||73.93||118.98||74||Tippecanoe Avenue, Anderson Street – San Bernardino International Airport, Loma Linda University|
|Loma Linda||74.96||120.64||75||Mountain View Avenue|
SR 210 west (Foothill Freeway) to SR 330 north – Pasadena, Running Springs
|Former SR 30 west; SR 210 exits 85A-B eastbound; future I-210; signed as exit 77C westbound|
SR 38 east (Orange Street) / Eureka Street
6th Street to SR 38 – Big Bear
|79.53||127.99||80||University Street||Eastbound signage|
|Cypress Avenue||Westbound signage|
|80.79||130.02||81||Ford Street, Redlands Boulevard||Redlands Boulevard is former US 99 north|
|—||I-10 San Bernardino Express Lanes (eastern expansion)||Eastern end of proposed expansion|
|81.95||131.89||82||Wabash Avenue||Westbound exit and eastbound entrance|
|84.69||136.30||85||Oak Glen Road, Live Oak Canyon Road|
|85.63||137.81||Wildwood Rest Area (eastbound only)|
|Yucaipa–Calimesa line||86.84||139.76||87||County Line Road|
|Riverside||Calimesa||87.68||141.11||88||Calimesa Boulevard||Former US 99 north|
|88.74||142.81||89||Singleton Road||Westbound exit and eastbound entrance|
|89.87||144.63||90||Cherry Valley Boulevard – Cherry Valley|
|90.88||146.26||Brookside Rest Area (westbound only)|
|Beaumont||92.35||148.62||92||Oak Valley Parkway|
SR 60 west (Moreno Valley Freeway) – Riverside
|Left exit westbound; no westbound entrance; former US 60 west|
|6th Street||Eastbound exit and westbound entrance; former US 60 east / US 99 south|
SR 79 south (Beaumont Avenue)
|95.03||152.94||95||Pennsylvania Avenue||Westbound exit and eastbound entrance|
|Beaumont–Banning line||96.13||154.71||96||Highland Springs Avenue|
|98.78||158.97||99||22nd Street – Downtown Banning|
SR 243 south (8th Street) – Idyllwild
|100.68||162.03||101||Hargrave Street – Idyllwild|
|101.58||163.48||102||Ramsey Street||Westbound exit and eastbound entrance; former US 60 west / US 99 north|
|Banning–Cabazon line||103.36||166.34||103||Malki Road||Formerly Fields Road|
|Cabazon||104.48||168.14||104||Morongo Trail – Cabazon||Former US 99 south; formerly Apache Trail|
|106.22||170.94||106||Main Street – Cabazon||Former US 99 north|
|||111.37||179.23||110||Haugen–Lehmann Way||Formerly Verbena Avenue; previously exit 111|
SR 111 south – Palm Springs
|Eastbound exit and westbound entrance; previously exit 112|
|113.07||181.97||Whitewater Rest Area|
|114.05||183.55||114||Whitewater (Tipton Road, Whitewater Cutoff)|
SR 62 east – Twentynine Palms, Yucca Valley
|Signed as "29 Palms"|
|Palm Springs–Desert Hot Springs line||119.95||193.04||120||Indian Canyon Drive – North Palm Springs||Formerly Indian Avenue|
|122.96||197.88||123||Gene Autry Trail, Palm Drive – Desert Hot Springs|
|Cathedral City||126.31||203.28||126||Date Palm Drive|
|130.18||209.50||130||Bob Hope Drive, Ramon Road – Palm Springs|
|Palm Desert||131.33||211.36||131||Monterey Avenue – Thousand Palms|
|Portola Avenue||Proposed interchange|
|Indio||139.16||223.96||139||Indio Boulevard, Jefferson Street||Indio Boulevard is former US 99 south / SR 86 south|
|141.56||227.82||142||Monroe Street – Central Indio|
Golf Center Parkway to SR 111
SR 86 south (Expressway) – Brawley, El Centro
|Eastbound exit and westbound entrance; former SR 86S|
Dillon Road to SR 86 south (Expressway) – Coachella
|Signed as Dillon Road only eastbound|
|Avenue 50||Proposed interchange|
|||158.82||255.60||Cactus City Rest Area|
|||168.37||270.97||168||Cottonwood Springs Road – Mecca, Twentynine Palms||Former SR 195|
|||172.89||278.24||173||Summit Road – Chiriaco Summit|
|||181.87||292.69||182||Red Cloud Road|
|||188.83||303.89||189||Eagle Mountain Road|
SR 177 north (Rice Road) – Desert Center
|||201.22||323.83||201||Corn Springs Road|
|||216.76||348.84||217||Ford Dry Lake Road|
|||221.87||357.07||222||Wiley's Well Road|
|||231.94||373.27||232||Mesa Drive – Blythe Airport, Mesa Verde||Former US 60 east|
SR 78 west (Neighbours Boulevard south) / I-10 BL east (Neighbours Boulevard north) – Brawley
US 95 north (Intake Boulevard) – Needles, Fairgrounds
|Western end of US 95 overlap|
|242||E. Hobson Way (I-10 BL)||Westbound exit and entrance|
|242.92||390.94||243||Riviera Drive / I-10 BL west||Eastbound exit and entrance; westbound exit and entrance replaced by exit 242; I-10 Bus. is former US 60 west|
|Agricultural Inspection Station (westbound only)|
|Colorado River||243.31||391.57||California–Arizona line|
I-10 east / US 95 south – Phoenix, Yuma
|Continuation into Ehrenberg, Arizona|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
Spur to US 101
Interstate 10 Spur to US 101
|Length||1.0 mi (1.6 km)|
The legislative definition of Route 10 includes a spur from I-5 (the Golden State Freeway) west to US 101 (the Santa Ana Freeway) near downtown Los Angeles. This section of roadway, the westernmost part of the San Bernardino Freeway, was in fact part of the original San Bernardino Freeway, carrying US 60/US 70/US 99 long before the Golden State Freeway opened. It was added to the Interstate Highway System by 1958 as I-110, but in 1968 it was removed from the system, becoming a Route 10 spur.
This road is signed only for the roads it feeds into: US 101 northbound and I-10 eastbound. It has only two interchanges between its ends: a westbound exit off the spur at Mission Road immediately before merging with US 101 northbound, and the eastbound exit for State Street and Soto Street before it merges onto I-10 eastbound—this one is numbered (as exit 19). There is no direct access from the I-10 spur to I-5.
The entire route is in Los Angeles, Los Angeles County.
US 101 north (Santa Ana Freeway)
|Western terminus of San Bernardino Freeway; no access to US 101 south; US 101 exit 1D|
|0.1||0.16||—||Mission Road||Westbound exit and eastbound entrance; also includes access from Pleasant Avenue and northbound US 101 (via exit 1D) onto entrance ramp|
|0.6||0.97||19||State Street to Soto Street||Eastbound exit and westbound entrance|
I-10 east (San Bernardino Freeway east)
|No access to I-10 west; freeway continues as I-10 east|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
There are three auxiliary Interstate Highways associated with I-10 in California:
- The Harbor Freeway between SR 47 in the San Pedro district of Los Angeles and I-10 near Downtown Los Angeles is designated as I-110. The rest of the highway, running along the historic Arroyo Seco Parkway to Pasadena, is instead designated as SR 110.
- The Foothill Freeway between I-5 in the Sylmar district of Los Angeles and SR 57 in Glendora is designated as I-210. The rest of the Foothill Freeway, between SR 57 and I-10 in Redlands, is instead designated as SR 210.
- The Long Beach Freeway between SR 47 in Long Beach and I-10 in Monterey Park is designated as I-710. Due to community opposition, a northern extension through South Pasadena was never constructed; the segment that was completed in Pasadena between California Boulevard and I-210 instead has the unsigned designation of SR 710.
One business loop of I-10 exists in California, running through Blythe in Riverside County.
- California Roads portal
- Lloyd G. Davies, Los Angeles City Council member, 1943–51, urged rail transportation on the Santa Monica Freeway
- ^ a b c d e f Clarion, Christian (March 17, 2020). "Interstate 10 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. Retrieved May 8, 2022.
- ^ a b c "Interstate Highway Types and the History of California's Interstates". California Highways. Retrieved November 29, 2011.[self-published source]
- ^ "Interstate 10". California Highways. Retrieved November 29, 2011.[self-published source]
- ^ a b Trone, Kimberly (January 11, 2002). "Freeway Signs Pay Tribute to Bono". The Desert Sun. p. B1.
- ^ 2004 Named Freeways, Highways, Structures and Other Appurtenances In California (PDF). California Department of Transportation. January 2004. pp. 7–8. Archived (PDF) from the original on November 7, 2005. Retrieved December 8, 2017.
- ^ a b "California Legislature Approves Removal of the Christopher Columbus Transcontinental Highway Designation of the I-10 Freeway". Los Angeles City County Native American Indian Commission. September 1, 2022. Retrieved September 1, 2022.
- ^ a b "Christopher Columbus' name to be removed from stretch of I-10 in LA". Spectrum News 1. Charter Communications. September 1, 2022. Retrieved December 11, 2022.
- ^ Adderly, Kevin (December 31, 2014). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2014". Route Log and Finder List. Federal Highway Administration. Retrieved December 6, 2015.
- ^ "Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
- ^ Federal Highway Administration (March 25, 2015). National Highway System: California (South) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 20, 2017.
- ^ Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
- ^ "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
- ^ California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved October 20, 2017.
- ^ California Department of Transportation; California State Transportation Agency (January 2021). 2020 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). Sacramento: California Department of Transportation. pp. 17–20. Archived from the original (PDF) on October 20, 2022.
- ^ a b c d e Rand McNally (2008). The Road Atlas. Chicago: Rand McNally. pp. 15, 17–19.
- ^ a b c d Thomas Brothers (1999). Los Angeles and Orange Counties Street Guide and Directory. Thomas Brothers. pp. 596–600, 631–641, 671.
- ^ Masters, Nathan (September 10, 2012). "Creating the Santa Monica Freeway". KCET. Retrieved July 4, 2016.
Photo caption: Opening of the Interstate 10 freeway into Santa Monica on January 5, 1966.
- ^ Dimassa, Cara Mia (November 27, 2001). "Freeway a Mess? Stop and Take a Look at Yourself". Los Angeles Times. Retrieved July 4, 2016.
- ^ a b Thomas Brothers (1999). San Bernardino and Riverside Counties Street Guide and Directory. Thomas Brothers. pp. 390–392, 601–608, 648–649, 689–690, 720–726, 756–758, 788, 819, 5410, 5471, 5491.
- ^ Google (September 2021). "Eastbound I-10 approaching SR 111". Google Street View. Google. Retrieved May 12, 2022.
- ^ Google (September 2021). "Sonny Bono Mem Fwy (Eastbound I-10 near SR 86)". Google Street View. Google. Retrieved May 12, 2022.
- ^ "Using Metro ExpressLanes". www.metroexpresslanes.net. Los Angeles County Metropolitan Transportation Authority. Retrieved August 14, 2022.
- ^ a b c "I-10 ExpressLanes Extension Project". Los Angeles County Metropolitan Transportation Authority. Retrieved August 12, 2022.
- ^ a b c d e "I-10 Express Lanes". San Bernardino County Metropolitan Transportation Authority. Retrieved August 12, 2022.
- ^ Rand McNally (1926). California (Map). Chicago: Rand McNally. Archived from the original on July 26, 2011. Retrieved November 29, 2011.
- ^ United States Numbered Highways. American Association of State Highway Officials. 1927.[full citation needed]
- ^ Rand McNally (1926). Los Angeles and Vicinity (Map). Chicago: Rand McNally. Archived from the original on May 25, 2011. Retrieved November 29, 2011.
- ^ a b "Chronology of California Highways 1915–1932". California Highways. Retrieved November 29, 2011.[self-published source]
- ^ Johnston, Louis; Williamson, Samuel H. (2023). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved January 1, 2023. United States Gross Domestic Product deflator figures follow the Measuring Worth series.
- ^ Masters, Nathan (August 15, 2012). "L.A.'s First Freeways". KCET. Retrieved April 4, 2013.
- ^ "Chronology of California Highways 1933–1946". California Highways. Retrieved November 29, 2011.[self-published source]
- ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
- ^ "The Northridge Earthquake: Progress Made, Lessons Learned in Seismic-Resistant Bridge Design". Public Roads. Federal Highway Administration. Summer 1994. Retrieved November 29, 2011.
- ^ "Metro ExpressLanes to Open on San Bernardino (10) Freeway". Los Angeles: KNBC-TV. February 22, 2013. Retrieved February 28, 2013.
- ^ Brunell, Natalie; Terlecky, Megan (July 19, 2015). "Bridge Collapses on I-10 in Desert Center, Traps Vehicle". Palm Springs, CA: KESQ-TV. Archived from the original on July 21, 2015. Retrieved July 19, 2015.
- ^ "Bridge over 10 Fwy East of Coachella Collapses into Flood Waters". Los Angeles: KABC-TV. July 20, 2015. Retrieved July 20, 2015.
- ^ "Pomona: Ganesha Blvd. Renamed". Los Angeles Times. March 22, 1990. Retrieved March 20, 2021.
- ^ Department of Public Works. "I-10/Portola Avenue Interchange Project". City of Palm Desert. Retrieved July 19, 2019.
- ^ DiPierro, Amy. "A developer bought four square miles north of I-10 in Coachella for $14 million". Desert Sun. Retrieved August 8, 2019.
- ^ Google (May 15, 2015). "Map of the I-10 spur (San Bernardino Freeway)" (Map). Google Maps. Google. Retrieved May 15, 2015.
- Metro ExpressLanes – includes toll information on the I-10 Express Lanes
- Interstate 10, Interstate-Guide.com
- Interstate 10, California @ AARoads.com
- Interstate 10 highway conditions, Caltrans
- Interstate 10, California Highways
- Juan Bautista de Anza National Historic Trail official U.S. National Park Service website
- Interstate Highways in California
- Interstate 10
- Southern California freeways
- Roads in Los Angeles County, California
- Roads in Riverside County, California
- Roads in San Bernardino County, California
- Transportation in Los Angeles
- Transportation in San Bernardino, California
- San Gorgonio Pass
- Coachella Valley
- Colorado Desert
- U.S. Route 99