Interstate 10 in California

Interstate 10
I-10 highlighted in red
Route information
Defined by Streets and Highways Code § 310
Maintained by Caltrans
Length:	243.31 mi[1] (391.57 km)
Existed:	August 7, 1947 by FHWA[2] July 1, 1964 by Caltrans[3] – present
Major junctions
West end:	SR 1 in Santa Monica
	I-405 in Los Angeles I-110 / SR 110 in Los Angeles I-5 / US 101 / SR 60 in Los Angeles I-710 in Monterey Park I-605 in Baldwin Park I-15 in Ontario I-215 in San Bernardino SR 210 in Redlands SR 60 in Beaumont US 95 in Blythe
East end:	I-10 / US 95 at Arizona state line
Location
Counties:	Los Angeles, San Bernardino, Riverside
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future State highways in California Interstate U.S. State Pre-1964 History Unconstructed Deleted Freeway Scenic ← SR 9 SR 11 →

Interstate 10 (I-10, The 10), a major east–west Interstate Highway, runs in the U.S. state of California east from Santa Monica, on the Pacific Ocean, through Los Angeles and San Bernardino to the border with 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 Interstate 5 (the Golden State Freeway) at the East Los Angeles Interchange.

Interstate 10 also has portions designated as either the Rosa Parks Freeway or the Redlands Freeway.

Route description

Interstate 10 begins at the McClure Tunnel in Santa Monica, California.

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 Interstate 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 Interstate 110) until 1968, is signed overhead for I-10 eastbound and for U.S. 101 westbound. This I-5/I-10 cosigning is consistent with the Federal Highway Administration's Interstate Highway route logs that such an overlap exists for the segment of I-10 in California.^[4]

I-10 is part of the California Freeway and Expressway System and is eligible for the State Scenic Highway System.^[5][6] However, it is not actually a scenic highway as designated by Caltrans.^[7] The Santa Monica Freeway is Route 10 from Route 1 to Route 5, as named by the State Highway Commission on April 25, 1957.^[8]

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.^[9]

Santa Monica Freeway

The Santa Monica Freeway is the westernmost segment of Interstate 10, beginning at the western terminus of I-10 at the Pacific Coast Highway in Santa Monica, California and ending southeast of downtown Los Angeles at the East Los Angeles Interchange.

The Santa Monica Freeway interchange with the Harbor Freeway, as seen by traffic going eastbound on the Santa Monica

Downtown Los Angeles skyline as seen from the freeway. A slight (smaller than usual rush hour) traffic jam is ahead.

Interstate 10 begins in the city of Santa Monica when State Route 1 turns into a freeway and heads east. SR 1 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 Interstate 405. Interstate 10 then continues through Sawtelle, Rancho Park, Cheviot Hills, Beverlywood and Crestview in West Los Angeles, Lafayette Square and Wellington Square in Mid-City, Arlington Heights, West Adams and Jefferson Park into downtown Los Angeles. On the western edge of downtown, I-10 has an interchange with Interstate 110 to the south and State Route 110 to the north. I-10 then travels along the southern edge of downtown to the East Los Angeles Interchange.^[10][11]

A typical traffic jam on the Santa Monica Freeway, at 2:30 p.m. on a Wednesday afternoon

At the East Los Angeles Interchange, State Route 60 diverges east towards Riverside and Pomona. I-10 then turns north, running concurrently with Interstate 5 for a few miles. Then, Interstate 10 heads east and merges with the traffic from the spur to US 101 onto the San Bernardino Freeway.^[10][11]

Heavily defaced button copy sign marking an entrance to the Santa Monica Freeway, 2005

The freeway is 14 lanes wide (two local, five express in each direction) from the Harbor Freeway (Interstate 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 (though a much smaller version) opened in 1965, with a formal dedication held in 1966.^[12]

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).^[13]

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

Heavy traffic in downtown San Bernardino along the San Bernardino Freeway near the interchange with the Downtown San Bernardino Freeway (I-215)

Interstate 10 heads east from the Downtown Los Angeles Eastside Los Angeles region, with two HOV lanes paralleling it on the north side called the El Monte Busway. These roadways extend to Alameda Street on US 101, following the spur west to where I-10 passes California State University Los Angeles. However, after the Interstate 710 interchange, these lanes merge back into the typical left lanes of each roadway.

East of Interstate 710, I-10 continues through Monterey Park, Alhambra, Rosemead, San Gabriel, El Monte, and Baldwin Park before intersecting with Interstate 605. It then travels through West Covina and Covina before heading up Kellogg Hill into San Dimas, where I-10 intersects with State Route 57 (formerly part of Interstate 210) and State Route 71 at the Kellogg Interchange. I-10 then heads east through Pomona and Claremont, and leaving L.A. County to enter San Bernardino County.^[10][11]

Interchange with the Ontario Freeway (I-15) as seen by west-bound traffic on the San Bernardino Freeway.

In San Bernardino County, Interstate 10 travels through Montclair, Upland, and Ontario, providing access to Ontario International Airport. I-10 then has a four-level interchange with Interstate 15 before traveling through Fontana, Rialto, and Colton. I-10 then intersects with Interstate 215 before briefly entering San Bernardino city proper and traveling through Loma Linda and Redlands. In Redlands, I-10 intersects with the State Route 210 freeway (future Interstate 210) and with State Route 38 before entering Yucaipa and eventually Riverside County.^[10][14]

Riverside County

Cabazon Dinosaurs is a roadside attraction at the Main Street exit in Cabazon.

In Riverside County, I-10 goes through Calimesa before entering Beaumont and merging with the eastern end of State Route 60 (itself formerly the California segment of US 60). In Banning, I-10 has a diamond intersection with State Route 243 before passing through San Gorgonio Pass between the San Bernardino Mountains and the San Jacinto Mountains and entering Palm Springs. I-10 intersects with the western end of State Route 111, whereas I-10 bypasses the town and connects to State Route 62, a major east–west route through the Mojave Desert. I-10 cuts through Cathedral City and passes just outside the city limits of Rancho Mirage, Palm Desert, and Indian Wells before entering Indio. I-10 then has an interchange in Coachella with the northern end of the State Route 86 freeway, which also leads to SR-111. Past Coachella, I-10 traverses the Mojave Desert, with few junctions and no cities. Several miles east and roughly halfway between Indio and Blythe, in the community of Desert Center, I-10 intersects with State Route 177, a turnoff that connects to SR-62. Near the Arizona state line, I-10 meets the terminus of State Route 78. In the city of Blythe, I-10 runs concurrently with U.S. Route 95 as both routes cross the Colorado River into Arizona.^[10][14]

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.

History

I-10 after the 1994 collapse

What is now Interstate 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.^[15] In late 1926, U.S. Route 99 was designated along the section of road from San Bernardino to Indio, where it turned south along present State Route 86 on the west side of the Salton Sea.^[16] West of San Bernardino, US 99 ran to Los Angeles concurrent with U.S. Route 66 (via Pasadena) before turning north; this route to Los Angeles is north of the later alignment of Interstate 10.^[17] 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; see U.S. Route 99 and State Route 86 for details. A 1931 extension took it south to Calexico on present State Route 111.)^[18]

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 State Route 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.^[18] Neither of these was a signed route until around 1932, when U.S. Route 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 State Route 60 now is west of Pomona, but an alignment close to present I-10 opened around 1934).^[19][20]

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. U.S. Route 70 was extended west from Arizona ca. 1936 along the whole route to Los Angeles,^[19] and, between 1933 and 1942,^[21] 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.

Interstate 10 eastbound near Indio

I-10 holds the distinction of being the first freeway in Los Angeles. A four-mile section of today's freeway was built between 1933 and 1935 at a cost of $877,000. 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.^[22]

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.^[2] 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. Those three routes were all removed in the 1964 renumbering, 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.^[23] It was signed as State Route 26 by 1942, running primarily Olympic Boulevard.^[21] 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.^[2] It was completed ca. 1964,^[24] 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.^[25]

The El Monte Busway was converted to high occupancy toll (HOT) lanes in 2013 as part of the Metro ExpressLanes project.^[26]

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.^[27][28]

On October 23, 2016 thirteen people died in a tour bus crash. The cause is under investigation.

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.

Future

With the increasing high traffic volume between Los Angeles and San Bernardino, Caltrans has a few projects on the books to relieve the traffic congestion:

• Widen I-10 from Yucaipa to Redlands (complete)
• Add high-occupancy vehicle lanes between Ontario and Redlands, funded in part by San Bernardino County's Measure I, which established a half-cent transportation sales tax.^[29]

Exit list

County	Location	mi[1]	km	Exit[1]	Destinations	Notes
Los Angeles	Santa Monica	0.00	0.00		SR 1 north (Pacific Coast Highway) – Oxnard	National western terminus; west end of SR 1 overlap; former US 101 Alt. north
				1A	4th Street, 5th Street	Westbound exit and eastbound entrance
		0.96	1.54	1B	To SR 1 south (Lincoln Boulevard)	East end of SR 1 overlap; signed as exit 1A eastbound; former SR 1 south/SR 2 east; former US 66 east/US 101 Alt. south
				1C	20th Street	Eastbound exit and westbound entrance
		2.08	3.35	2A	Cloverfield Boulevard	Westbound exit and eastbound entrance
		2.30	3.70	2B	Centinela Avenue
	Los Angeles	2.35	3.78	2C	Bundy Drive	Westbound exit and eastbound entrance; signed as exits 2B (south) and 2C (north)
		3.11– 3.29	5.01– 5.29	3	I-405 (San Diego Freeway) – Sacramento, LAX Airport, Long Beach	Signed as exits 3A (north) and 3B (south); former SR 7; I-405 north exit 53B, south exit 53
		4.24	6.82	4	National Boulevard, Overland Avenue	Signed as just "Overland Avenue" westbound
		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	La Cienega Boulevard, Venice Boulevard (SR 187 west)
		7.00	11.27	7B	Fairfax Avenue, Washington Boulevard
		8.27	13.31	8	La Brea Avenue
		9.23	14.85	9	Crenshaw Boulevard
		10.16	16.35	10	Arlington Avenue
		10.66	17.16	11	Western Avenue	No exit number westbound
				12	Normandie Avenue	No exit number westbound
		11.64	18.73		Vermont Avenue
		12.25	19.71		Hoover Street
		12.68– 12.73	20.41– 20.49	13	I-110 south / SR 110 north (Harbor Freeway) / Pico Boulevard – San Pedro, Pasadena, Downtown Los Angeles	Signed as exits 13A (south) and 13B (north) eastbound; I-110/SR 110 exit 21
				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
		14.55	23.42	15A	Central Avenue
		15.19	24.45	15B	Alameda Street
		15.71	25.28	16A	Mateo Street, Santa Fe Avenue
		16.23	26.12	—	SR 60 east (Pomona Freeway) to I-5 south (Santa Ana Freeway) – Pomona, Santa Ana	Eastbound exit and westbound entrance; SR 60 west 1A
				—	Boyle Avenue	Eastbound exit only
				—	I-5 south (Santa Ana Freeway) to SR 60 east (Pomona Freeway) / Soto Street – Santa Ana, Pomona	West end of I-5 overlap; westbound exit and eastbound entrance; east end of Santa Monica Freeway;[30] SR 60 west exit 1E
				135A[lower-alpha 1]	Fourth Street
				135B[lower-alpha 1]	Cesar Chavez Avenue	Eastbound exit and westbound entrance
		19.00	30.58	—	I-5 north (Golden State Freeway) – Sacramento	East end of I-5 overlap; I-5 north exit 135C, south exit 135B
		19.07	30.69	19A	State Street	Westbound left exit and eastbound entrance
		19.00	30.58	—	To US 101 north (Santa Ana Freeway) / San Bernardino Freeway west – Los Angeles	Westbound left exit and eastbound left entrance
		19.07	30.69	19C	Soto Street	No eastbound entrance; no exit number 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 exit is part of the I-710 exit; serves CSU Los Angeles
	Monterey Park	20.77	33.43	—	I-710 (Long Beach Freeway) / Valley Boulevard – Long Beach	Eastbound exit and westbound entrance also include ramps to/from Ramona Road; I-710 north exit 22, south exits 22A-B
	Alhambra			—	I-10 Express Lanes – El Monte Busway	Westbound left exit and eastbound left entrance
		21.70	34.92	22	Fremont Avenue – South Pasadena
		22.72	36.56	23A	Atlantic Boulevard – Monterey Park
		23.38	37.63	23B	Garfield Avenue – Alhambra
	San Gabriel–Rosemead line	24.22	38.98	24	New Avenue – Monterey Park
		24.72	39.78	25A	Del Mar Avenue – San Gabriel	Eastbound exit and westbound entrance for Express Lanes only
		25.23	40.60	25B	San Gabriel Boulevard
	Rosemead	25.73	41.41	26A	Walnut Grove Avenue
	Rosemead–El Monte line	26.35	42.41	26B	SR 19 (Rosemead Boulevard) – Pasadena	Access to Flair Drive eastbound
	El Monte	27.35	44.02	27	Temple City Boulevard – Rosemead	Westbound exit and entrance
					Baldwin Avenue – El Monte	Eastbound exit and entrance
		28.06	45.16	28	Santa Anita Avenue – El Monte
		28.89	46.49	29A	Peck Road South
		28.94– 29.22	46.57– 47.03	29B	Peck Road North, Valley Boulevard	Westbound exits signed as 29B (Valley Boulevard) and 29C (Peck Road North)
					I-10 Express Lanes	East end of Express Lanes
		29.97	48.23	30	Garvey Avenue, Durfee Avenue	Westbound exit and eastbound entrance
	Baldwin Park	30.54– 30.59	49.15– 49.23	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 – Baldwin Park
		32.05	51.58	32B	Francisquito Avenue – La Puente	No eastbound entrance
		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 – West Covina	Westbound exit only
34.78		55.97	35	Vincent Avenue, Glendora Avenue
35.89		57.76	36	SR 39 (Azusa Avenue, CR N8 south)
36.87		59.34	37A	Citrus Street – Covina
37.40		60.19	37B	Barranca Street
37.90		60.99	38A	Grand Avenue – Walnut
38.39		61.78	38B	Holt Avenue – Covina
San Dimas	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 / I-210 west) to I-210 – Santa Ana	Signed as exit 42 westbound; SR 57 north is unsigned I-210 west; SR 57 north exit 21, south exits 22A-B
	42.07	67.71	42B	SR 71 south (Chino Valley Freeway) / Campus Drive – Corona	Westbound exit is via exit 44; SR 71 exit 15
Pomona	43.05	69.28	43	Fairplex Drive – La Verne	Westbound exit is part of exit 44; serves Los Angeles County Fair
	43.58	70.14	44	Dudley Street
	44.67	71.89	45A	White Avenue	Westbound exit is via exit 45
	45.12	72.61	45B	Garey Avenue, Orange Grove Avenue – Pomona	Signed as exit 45 westbound
	45.80	73.71	46	Towne Avenue
Claremont	47.13	75.85	47	Indian Hill Boulevard – Claremont
San Bernardino	Montclair	48.33	77.78	48	Monte Vista Avenue
		48.89	78.68	49	Central Avenue
	Ontario–Upland line	50.03	80.52	50	Mountain Avenue – Mount Baldy
		51.13	82.29	51	SR 83 (Euclid Avenue) – Ontario, Upland
	Ontario	52.90	85.13	53	4th Street
		53.76	86.52	54	Vineyard Avenue
		54.82	88.22	55A	Holt Boulevard	Eastbound exit is via exit 54; former US 99 north
				55B	Archibald Avenue – Ontario Airport	Signed as exit 55 eastbound
		55.83	89.85	56	Haven Avenue
		56.84	91.48	57	Milliken Avenue
		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 north exit 109, south exits 109A-B
		58.79	94.61	59	Etiwanda Avenue, Valley Boulevard	Valley Blvd was former US 99 south
	Fontana	60.83	97.90	61	Cherry Avenue
		62.84	101.13	63	Citrus Avenue
		63.88	102.80	64	Sierra Avenue – Fontana
	Bloomington	66.15	106.46	66	Cedar Avenue – Bloomington
	Rialto	67.33	108.36	68	Riverside Avenue – Rialto
	Colton	68.36	110.01	69	Pepper Avenue
		69.62	112.04	70A	Rancho Avenue
		70.28	113.10	70B	9th Street – Downtown Colton
		70.91	114.12	71	Mt. Vernon Avenue, Valley Boulevard, Sperry Drive	Valley Boulevard was former US 99 north
	San Bernardino	71.90	115.71	72	I-215 – San Bernardino, Barstow, Riverside	Former I-15E / US 91 / US 395; east end of San Bernardino Freeway;[30] west end of Redlands Freeway; I-215 north exit 40A-B, south exit 40
		72.92	117.35	73	Waterman Avenue	Signed as exits 73A (south) and 73B (north) eastbound
		73.93	118.98	74	Tippecanoe Avenue, Anderson Street – San Bernardino International Airport
	Loma Linda	74.96	120.64	75	Mountain View Avenue – Bryn Mawr
	Loma Linda–Redlands line	75.96	122.25	76	California Street
	Redlands	76.97	123.87	77A	Alabama Street
		77.29	124.39	77B	SR 210 west (Foothill Freeway) to SR 330 north – Pasadena, Running Springs	Former SR 30 west; SR 210 east exits 85A-B
		77.45	124.64	77C	Tennessee Street
		78.56	126.43	79	SR 38 (Orange Street) / 6th Street – Downtown Redlands
		79.53	127.99	80	University Street	Eastbound exit and westbound entrance
					Cypress Avenue	Westbound exit and eastbound entrance
		80.79	130.02	81	Ford Street, Redlands Boulevard	Redlands Boulevard was former US 99 north
	Yucaipa	81.95	131.89	82	Wabash Avenue	Westbound exit and eastbound entrance
		83.16	133.83	83	Yucaipa Boulevard – Yucaipa
		84.69	136.30	85	Oak Glen Road, Live Oak Canyon Road
	​	85.63	137.81	Wildwood Rest Area Eastbound only
Riverside	Calimesa	86.84	139.76	87	County Line Road
		87.68	141.11	88	Calimesa Boulevard – Calimesa	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
		93.49	150.46	93	SR 60 west (Moreno Valley Freeway) – Riverside	Left exit westbound; no westbound entrance; former US 60 west
					6th Street – Beaumont	Eastbound exit and westbound entrance; former US 60 east / US 99 south
		94.39	151.91	94	SR 79 south (Beaumont Avenue)
		95.03	152.94	95	Pennsylvania Avenue	Westbound exit and eastbound entrance
	Banning	96.13	154.71	96	Highland Springs Avenue
		98.15	157.96	98	Sunset Avenue
		98.78	158.97	99	22nd Street – Downtown Banning
		99.67	160.40	100	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
	​	103.36	166.34	103	Malki Road	Formerly Fields Road
	​	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	Railroad Avenue, Haugen–Lehmann Way – Whitewater	Formerly Verbenia Avenue
	​	112.02	180.28	111	SR 111 south – Palm Springs	Eastbound exit and westbound entrance
	Palm Springs	113.07	181.97	Whitewater Rest Area
	​	114.05	183.55	114	Whitewater
	​	116.51	187.50	117	SR 62 east – Twentynine Palms, Yucca Valley
	Palm Springs	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
	Rancho Mirage	130.18	209.50	130	Bob Hope Drive, Ramon Road – Palm Springs
	Palm Desert	131.33	211.36	131	Monterey Avenue – Thousand Palms
		133.71	215.19	134	Cook Street
		137.27	220.91	137	Washington Street
	Indio	139.16	223.96	139	Indio Boulevard, Jefferson Street – Indio	Indio Boulevard was former US 99 south / SR 86 south
		141.56	227.82	142	Monroe Street – Central Indio
		142.56	229.43	143	Jackson Street
		143.77	231.38	144	To SR 111 (Golf Center Parkway)
	Coachella	144.65	232.79	145	SR 86 south (Expressway) – Brawley, El Centro	Westbound exit is via exit 146; former SR 86S
		145.71	234.50	146	Dillon Road – Coachella
	​	158.82	255.60	Cactus City Rest Area
	​	161.94	260.62	162	Frontage Road
	​	168.37	270.97	168	Cottonwood Springs Road – Mecca, Twentynine Palms	Former SR 195
	​	172.89	278.24	173	Summit Road – Chiriaco Summit
	​	176.94	284.76	177	Hayfield Road
	​	181.87	292.69	182	Red Cloud Road
	​	188.83	303.89	189	Eagle Mountain Road
	​	191.92	308.87	192	SR 177 (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 – Wiley's Well Rest Area
	​	231.94	373.27	232	Mesa Drive – Blythe Airport, Mesa Verde	Former US 60 east
	​	235.97	379.76	236	SR 78 east (Neighbours Boulevard south) / I-10 Bus. west (Neighbours Boulevard north) – Brawley
	Blythe	238.97	384.58	239	Lovekin Boulevard – Blythe
		239.98	386.21	240	7th Street – Blythe
		240.99	387.84	241	US 95 north (Intake Boulevard) – Needles, Fairgrounds	West end of US 95 overlap
				242	Hobsonway (I-10 Bus.)	Westbound exit and entrance; opened in 2016
		242.92	390.94	243	Riviera Drive / I-10 Bus. 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)
		243.31	391.57		I-10 east / US 95 south – Phoenix, Yuma	Continuation into Arizona
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       ETC       Incomplete access       Route transition

Spur to US 101

The legislative definition of Route 10 includes a spur from Interstate 5 (the Golden State Freeway) west to U.S. Route 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 U.S. Route 60, U.S. Route 70 and U.S. Route 99 long before the Golden State Freeway opened. It was added to the Interstate Highway System by 1958 as Interstate 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 of the spur at Mission Road immediately before merging with U.S. Route 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).^[1] There is no access from the I-10 spur to I-5.^[11]

Exit list
The entire route is in Los Angeles, Los Angeles County.

mi[1]	km	Exit[31]	Destinations	Notes
0.0	0.0	—	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
1.0	1.6	—	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       Incomplete access       Route transition

See also

• California Roads portal

• Lloyd G. Davies, Los Angeles City Council member, 1943–51, urged rail transportation on the Santa Monica Freeway

References

External links

Wikimedia Commons has media related to Interstate 10 in California.

Route map: Google

• 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 10
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