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Interstate 10 in California

Route map:
From Wikipedia, the free encyclopedia
This article is about the section of Interstate 10 in California. For the entire route, see Interstate 10.
"Christopher Columbus Transcontinental Highway" redirects here. For the similarly named highway in New Jersey, see Interstate 80 in New Jersey.

Interstate 10 marker
Interstate 10
Pearl Harbor Memorial Highway
Map
I-10 highlighted in red
Route information
Maintained by Caltrans
Length242.54 mi[1] (390.33 km)
ExistedAugust 7, 1947, by FHWA[2]
July 1, 1964, by Caltrans[3]–present
NHSEntire route
Major junctions
West end SR 1 in Santa Monica
Major intersections
East end I-10 / US 95 at Arizona state line in Ehrenberg, AZ
Location
CountryUnited States
StateCalifornia
CountiesLos Angeles, San Bernardino, Riverside
Highway system
← SR 9→ SR 11

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, also known as the Pearl Harbor Memorial Highway,[4] 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 and San Bernardino freeways, 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 and Sonny Bono Memorial freeways.[5] Some parts were also formerly designated as the Christopher Columbus Transcontinental Highway.[6] However, the California State Legislature removed this designation following the passage of a bill on August 31, 2022.[7][8] I-10 is also known colloquially as "the 10" to Southern California residents (See also California English § Freeways).

The entirety of Interstate 10 in California is defined in the California Streets and Highways Code as Route 10.

Route description

[edit]
Time-lapse video of a trip on I-10 from Baldwin Park to its western terminus in Santa Monica
I-10 is signed as if it begins at the McClure Tunnel in Santa Monica, although it legally begins farther east at the SR 1 interchange at Lincoln Boulevard
A typical traffic jam on the Santa Monica Freeway, at 2:30 pm on a Wednesday afternoon near Robertson Boulevard
Downtown Los Angeles skyline as seen from the freeway. A slight (smaller than usual rush hour) traffic jam is ahead.
The Dosan Ahn Chang Ho Memorial Interchange (I-110), as seen by traffic going westbound on the Santa Monica
Heavily defaced button copy sign marking an entrance to the Santa Monica Freeway in Downtown Los Angeles, 2005
Interchange with the Ontario Freeway (I-15) as seen by westbound traffic on the San Bernardino Freeway
Heavy traffic from Downtown San Bernardino along the San Bernardino Freeway near the interchange with I-215
Cabazon Dinosaurs is a roadside attraction at the Main Street exit in Cabazon
I-10 eastbound in Whitewater at the exit for SR 111, looking east with the San Gorgonio Pass wind farm in the background. Note the overhead sign which gives "Indio [¶] Other Desert Cities" as the control cities.
I-10 eastbound near Indio

The California Streets and Highways Code defines Route 10 (I-10) from:

(a) Route 1 [State Route 1 (SR 1)] in Santa Monica to Route 5 [I-5] near Seventh Street in Los Angeles.
(b) Route 101 [US Route 101 (US 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.[9]

Because I-10 west of I-5 cannot access US 101, and I-10 east of I-5 cannot access US 101 southbound, signage instead directs motorists to the continuation of I-10 via I-5 between the East Los Angeles Interchange and the Santa Monica Freeway. The Federal Highway Administration (FHWA)'s Interstate Highway route logs, along with most maps, also indicate that I-10 is cosigned along this segment,[10] despite the legal definition. The short unsigned section of Route 10 between Route 5 and Route 101, which was formerly defined as Route 110 (signed as I-110) until 1968, carries overhead signage for I-10 eastbound and for US 101 westbound.

I-10 is part of the California Freeway and Expressway System[11] and is part of the National Highway System,[12] a network of highways that are considered essential to the country's economy, defense, and mobility by the FHWA.[13] I-10 is eligible to be included in the State Scenic Highway System,[14] but it is not officially designated as a scenic highway by Caltrans.[15] The Santa Monica Freeway is I-10 from SR 1 to I-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.[16] The removal of this designation, however, may result in the eventual removal of this signage.[7][8]

Santa Monica Freeway

[edit]

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.[17] 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.[18][19]

At the East Los Angeles Interchange, SR 60 diverges east toward 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.[18][19]

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 offramp. 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.[20]

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 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 US.[citation needed]

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).[21]

The Santa Monica Freeway is considered the border between Downtown and South Los Angeles. Part of the freeway also skims the Byzantine-Latino Quarter.

San Bernardino Freeway

[edit]

I-10 heads east from the East Los Angeles Interchange to I-710 in Monterey Park. It then continues through the San Gabriel Valley suburbs of Alhambra, Rosemead, San Gabriel, El Monte, and Baldwin Park before intersecting with I-605. It then travels through West Covina, briefly enters Covina, and then travels up the 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.[18][19]

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.[18][22]

In 2019, SBCTA planned to add two more interchanges in Fontana at Beech and Alder Avenues to reduce congestion at the Sierra and Cherry avenue exits. [23]

Riverside County

[edit]

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 and 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.[5] 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 Colorado 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 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.[18][22]

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 toward San Bernardino and/or Los Angeles in the Colorado 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.[24][25]

Express lanes

[edit]

There are two sections of high-occupancy toll (HOT) lanes along I-10, one in Los Angeles County and the other in San Bernardino County.

In Los Angeles County, the El Monte Busway is a grade-separated, shared-use HOT and express bus 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 busses exit the HOT lanes at El Monte Station west of I-605.[26]

The segment of HOT lanes in San Bernardino County opened in 2024, and runs between the Los Angeles county line and Etiwanda Avenue at the Ontario–Fontana city limit.[27]

The HOT lanes in Los Angeles County, part of the Metro ExpressLanes project administered by the Los Angeles County Metropolitan Transportation Authority (LA Metro), have different toll polices than the ones in San Bernardino County, operated by the San Bernardino County Transportation Authority (SBCTA) and using Transportation Corridor Agencies (TCA) as its processing partner. In both segments, tolls are collected using a congestion pricing system based on the real-time levels of traffic. All tolls are collected using an open road tolling system, and therefore there are no toll booths to receive cash. 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 (one, two, three, or more), regardless of whether they qualify for free. Solo drivers may also use the FasTrak standard tag without the switch. For both segments, carpools with three or more occupants are not charged.[26][28] For two-person carpools using the Los Angeles County segment, they are charged the posted toll during the peak hours between 5:00 am and 9:00 am, and between 4:00 pm and 7:00 pm; no toll is charged during off-peak hours.[26]

There are longer term plans to have continuous HOT lanes between Alameda Street in Los Angeles and Ford Street in Redlands. This expansion is planned in four phases. As of 2024, the proposed segment in Los Angeles County to bridge the gap between I-605 and the San Bernardino County line is under environmental review,[29] the section from Etiwanda Avenue to Pepper Avenue in Colton is planned to break ground in 2025, and the segment to Ford Street in Redlands is still in the planning stage.[30]

History

[edit]
I-10 after the 1994 collapse

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 US 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.[31] 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.[32] 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.[33] The piece of this between San Bernardino and Indio was defined in 1915 as Legislative Route 26 (LR 26). (It continued south from Indio via El Centro to Heber. A 1931 extension took it south to Calexico on present SR 111.)[34]

The route from Indio via Mecca to the Arizona state line near Blythe was defined in 1919 as pre-1964 LR 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.[34] 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 LR 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).[citation needed]

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,[citation needed] and, between 1933 and 1942,[citation needed] 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 $15.3 million in 2023[35]). 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.[36]

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. 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 LR 173, defined in 1933 from Santa Monica to Downtown Los Angeles.[37] It was signed as SR 26 by 1942, running primarily Olympic Boulevard.[citation needed] 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 c. 1964[38] and became I-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.[39]

The El Monte Busway was converted to HOT lanes in 2013 as part of the Metro ExpressLanes project.[40]

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.[41][42]

Shortly after midnight of November 11, 2023, a mile-long (1.6 km) segment of the freeway in Downtown Los Angeles between Alameda Street and Santa Fe Avenue suffered significant damage due to a fire at a pallet yard underneath the freeway. The fire melted the freeway's guardrails and damaged the supporting concrete columns.[43][44] The Los Angeles Times reported a couple of days later that "sanitizer accumulated during the height of the COVID-19 pandemic was stored under the overpass and helped fuel the flames".[45] Governor Gavin Newsom declared a state of emergency in response to the fire; the freeway was reopened after eight days, far ahead of the original five-week estimate.[46]

Juan Bautista de Anza National Historic Trail

[edit]

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 US national Historic and 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.

Exit list

[edit]
CountyLocationmi[17]kmExit[17]DestinationsNotes
Los AngelesSanta Monica0.000.00
 SR 1 north (Pacific Coast Highway) – Oxnard		Western end of SR 1 concurrency; former US 101 Alternate; western end of I-10/Santa Monica Freeway
1A4th Street / 5th StreetWestbound exit and eastbound entrance
0.961.541B

 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 StreetEastbound exit and westbound entrance
2.083.351CCloverfield BoulevardWestbound exit and eastbound entrance
2.303.702ACentinela AvenueSigned as exit 2 eastbound
Los Angeles2.353.782B-CBundy DriveWestbound exits 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 BeachSigned as exits 3A (north) and 3B (south); former SR 7; I-405 north exit 53B, south exit 53
4.246.824Overland Avenue / National BoulevardNational Boulevard not signed westbound
5.058.135National BoulevardWestbound exit and eastbound entrance
5.769.276Robertson Boulevard – Culver City
6.8110.967A SR 187 (Venice Boulevard) / La Cienega BoulevardSR 187 / Venice Boulevard not signed eastbound
7.0011.277BFairfax Avenue / Washington BoulevardWashington Boulevard not signed eastbound
8.2713.318La Brea Avenue
9.2314.859Crenshaw Boulevard
10.1616.3510Arlington Avenue
10.6617.1611Western Avenue
12Normandie AvenueSigned as exit 11 westbound
11.64–
12.25		18.73–
19.71		Vermont Avenue / Hoover Street
12.6820.4113A
 I-110 south (Harbor Freeway south) / Grand Avenue – San Pedro, Convention Center		Dosan Ahn Chang Ho Memorial Interchange; signed as exit 13 westbound; Grand Avenue is not accessible westbound; Pico Boulevard is not accessible eastbound; I-110 exit 21
12.7320.4913B
 SR 110 north (Harbor Freeway north) / Pico Boulevard – Pasadena, Downtown, Convention Center
13.6421.9514AMaple AvenueEastbound exit and westbound entrance
Los Angeles Street – Convention CenterWestbound exit and eastbound entrance
14.2222.8814BSan Pedro StreetNo westbound entrance
14.5523.4215ACentral Avenue
15.1924.4515BAlameda Street
15.5525.0316AMateo Street / Santa Fe Avenue
16.2326.1216B
 SR 60 east (Pomona Freeway) – Pomona		Eastbound exit and westbound entrance; western end of East Los Angeles Interchange; SR 60 west exit 1A; I-5 north exit 134A

 I-5 south (Santa Ana Freeway) – Santa Ana
—Boyle AvenueEastbound exit only
16B
 I-5 south (Santa Ana Freeway) / 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; SR 60 west exit 1E

 SR 60 east (Pomona Freeway) – Pomona
135A[a]Fourth Street
135B[a]Cesar Chavez AvenueEastbound exit and westbound entrance; formerly Brooklyn Avenue
19.00–
19.07		30.58–
30.69		19AState StreetWestbound left exit and eastbound entrance
19B
 I-5 north (Golden State Freeway) – Sacramento		Eastern end of I-5 overlap; 5-10 Split portion of the East Los Angeles Interchange; I-5 north exit 135C, south exit 135B


 San Bernardino Freeway spur to US 101 north (Santa Ana Freeway) – Los Angeles		Westbound left exit and eastbound entrance; US 101 exit 1D
19CSoto StreetNo eastbound entrance; signed as exit 19 eastbound
—Marengo StreetEastbound entrance only
East Los Angeles19.5931.5320ACity Terrace DriveEastbound exit and westbound entrance
20.2432.5720BEastern AvenueWestbound access is part of the I-710 exit; serves CSU Los Angeles
Monterey Park20.7733.4321 I-710 (Long Beach Freeway) / Valley Boulevard – Long BeachEastbound exit and westbound entrance ramps also include ramps to/from Ramona Road; I-710 exit 22 northbound, 22A-B southbound
Alhambra—

 El Monte Busway west to US 101 north / Alameda Street		Express Lanes access only; westbound exit and eastbound entrance
—I-10 LA Metro Express LanesFirst westernmost access point from mainline I-10
21.7034.9222Fremont Avenue – South Pasadena
22.7236.5623AAtlantic Boulevard – Monterey Park
23.3837.6323BGarfield Avenue
Alhambra–San Gabriel–
Monterey Park tripoint		24.2238.9824New Avenue
San Gabriel–Rosemead line24.7239.78—Del Mar AvenueExpress Lanes access only; eastbound exit and westbound entrance
25ADel Mar AvenuePreviously exit 25B
25.2340.6025BSan Gabriel Boulevard
Rosemead25.7341.4126AWalnut Grove Avenue
Rosemead–El Monte line26.2542.2526B SR 19 (Rosemead Boulevard) – PasadenaIncludes access to/from Flair Drive eastbound
27.3544.0227Temple City BoulevardWestbound signage; previously exit 28
Baldwin AvenueEastbound signage
—El Monte Busway east to El Monte StationBuses only via Express Lanes; eastbound exit and westbound entrance
El Monte28.0645.1628Santa Anita AvenuePreviously exit 29
28.8946.4929APeck Road South
28.94–
29.22		46.57–
47.03		29BPeck Road North, Valley BoulevardWestbound exits signed as 29B (Valley Boulevard) and 29C (Peck Road North)
—I-10 LA Metro Express LanesEastern end of Express Lanes
—I-10 LA Metro Express Lanes (eastern expansion)Western end of proposed expansion[29]
29.9748.2330Garvey Avenue, Durfee AvenueWestbound exit and eastbound entrance
Baldwin Park30.54–
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
30.9349.7831BFrazier StreetSigned as exit 31C eastbound; no eastbound entrance
31.6150.8732ABaldwin Park Boulevard
32.0551.5832BFrancisquito Avenue – La PuenteNo eastbound entrance; previously exit 33A
32.7452.6933Puente Avenue – Industry
West Covina33.8554.4834APacific Avenue, West Covina ParkwaySigned as exit 34 eastbound
34.2455.1034BSunset AvenueWestbound exit only
34.7855.9735Vincent Avenue
35.8957.7636 SR 39 (Azusa Avenue)
36.8759.3437ACitrus Street
37.4060.1937BBarranca Street
37.9060.9938AGrand Avenue
West Covina–Covina line38.3961.7838BHolt Avenue
Covina–San Dimas line39.8564.1340Via Verde
Pomona41.4166.6441Kellogg Drive – Cal Poly UniversityNo eastbound entrance
Pomona–San Dimas line41.8367.3242A
 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
42.0767.7142B
 SR 71 south (Chino Valley Freeway) / Campus Drive – Corona		Eastbound exit and westbound entrance; eastern end of Kellogg Interchange; SR 71 north exit 15
Pomona43.05–
43.58		69.28–
70.14		44Fairplex Drive, Dudley StreetSigned as exits 43 (Fairplex Drive) and 44 (Dudley Street) eastbound; Fairplex Drive was formerly Ganesha Boulevard;[47] serves Fairplex
44.6771.8945AWhite AvenueEastbound exit and westbound entrance; former exit 45
45.1272.6145BGarey Avenue, Orange Grove AvenueSigned as exit 45 westbound; Orange Grove Avenue not signed eastbound
45.8073.7146Towne Avenue
Claremont47.1375.8547Indian Hill Boulevard
Los Angeles–San Bernardino
county line		Claremont–Montclair line—I-10 LA Metro Express Lanes (eastern expansion)Western end of proposed expansion[29]
—I-10 San Bernardino Express LanesWestern end of express lane; opened in 2024[27]
San BernardinoMontclair48.3477.8048Monte Vista Avenue
48.8978.6849Central Avenue
Ontario–Upland line50.0380.5250Mountain Avenue – Mount Baldy
51.1382.2951 SR 83 (Euclid Avenue) – Ontario, Upland
Ontario52.9085.13534th Street
53.7686.5254Vineyard Avenue
54.8288.2255AHolt BoulevardWestbound exit and eastbound entrance; former US 99 north
55B Archibald Avenue – Ontario AirportSingle-point urban interchange, signed as exit 55 eastbound
55.8389.8556Haven Avenue
56.8491.4857Milliken Avenue
57.6092.7058 I-15 (Ontario Freeway) – San Diego, BarstowSigned as exits 58A (north) and 58B (south) eastbound; I-15 exits 109A-B
Ontario–Fontana line58.7994.6159Etiwanda Avenue, Valley BoulevardValley Boulevard was former US 99 south
—I-10 San Bernardino Express LanesEastern end of express lane; opened in 2024[27]
—I-10 San Bernardino Express Lanes (eastern expansion)Western end of proposed expansion[30]
Fontana60.8397.9061Cherry Avenue
62.84101.1363Citrus Avenue
63.88102.8064Sierra AvenueSingle-point urban interchange
Bloomington66.15106.4666Cedar Avenue – Bloomington
Rialto67.63108.8468Riverside Avenue
Colton68.63110.4569Pepper Avenue
69.62112.0470ARancho Avenue
70.28113.1070B9th Street – Downtown Colton
70.91114.1271Mt. Vernon Avenue
71.90115.7172 I-215 – San Bernardino, Barstow, RiversideFormer I-15E / US 91 / US 395; eastern end of San Bernardino Freeway; I-215 exit 40A-B northbound, 40 southbound
San Bernardino72.92117.3573Waterman AvenueSigned as exits 73A (south) and 73B (north) eastbound
San Bernardino–Loma Linda line73.93118.9874 Tippecanoe Avenue, Anderson Street – San Bernardino International Airport, Loma Linda University
Loma Linda74.96120.6475Mountain View Avenue
Redlands75.96122.2576California Street
76.97123.8777AAlabama Street
77.29124.3977B


 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 west; signed as exit 77C westbound
77.45124.6477CTennessee StreetSigned as exit 77B westbound
78.56126.4379
 SR 38 east (Orange Street) / Eureka Street		Eastbound signage

 6th Street to SR 38 – Big Bear		Westbound signage
79.53127.9980University StreetEastbound signage
Cypress AvenueWestbound signage
80.79130.0281Ford Street, Redlands BoulevardRedlands Boulevard is former US 99 north
—I-10 San Bernardino Express Lanes (eastern expansion)Eastern end of proposed expansion[30]
81.95131.8982Wabash AvenueWestbound exit and eastbound entrance
Yucaipa83.16133.8383Yucaipa Boulevard
84.69136.3085Oak Glen Road, Live Oak Canyon Road
85.63137.81Wildwood Rest Area (eastbound only)
San Bernardino–Riverside
county line		Yucaipa–Calimesa line86.84139.7687County Line Road
RiversideCalimesa87.68141.1188Calimesa BoulevardFormer US 99 north
88.74142.8189Singleton RoadWestbound exit and eastbound entrance
89.87144.6390Cherry Valley Boulevard – Cherry Valley
90.88146.26Brookside Rest Area (westbound only)
Beaumont92.35148.6292Oak Valley Parkway
93.49150.4693
 SR 60 west (Moreno Valley Freeway) – Riverside		Left exit westbound; no westbound entrance; former US 60 west
6th StreetEastbound exit and westbound entrance; former US 60 east / US 99 south
94.39151.9194
 SR 79 south (Beaumont Avenue)
95.03152.9495Pennsylvania AvenueWestbound exit and eastbound entrance
Beaumont–Banning line96.13154.7196Highland Springs Avenue
Banning98.15157.9698Sunset Avenue
98.78158.979922nd Street – Downtown Banning
99.67160.40100
 SR 243 south (8th Street) – Idyllwild
100.68162.03101Hargrave Street – Idyllwild
101.58163.48102Ramsey StreetWestbound exit and eastbound entrance; former US 60 west / US 99 north
Banning–Cabazon line103.36166.34103Malki RoadFormerly Fields Road
Cabazon104.48168.14104Morongo Trail – CabazonFormer US 99 south; formerly Apache Trail
106.22170.94106Main Street – CabazonFormer US 99 north
​111.37179.23110Haugen–Lehmann WayFormerly Verbena Avenue; formerly exit 111
Palm Springs112.02180.28111
 SR 111 south – Palm Springs		Eastbound exit and westbound entrance; formerly exit 112
113.07181.97Whitewater Rest Area
114.05183.55114Whitewater (Tipton Road, Whitewater Cutoff)
​116.51187.50117
 SR 62 east – Twentynine Palms, Yucca Valley		Signed as "29 Palms"
Palm Springs–Desert Hot Springs line119.95193.04120Indian Canyon Drive – North Palm SpringsFormerly Indian Avenue
122.96197.88123Gene Autry Trail, Palm Drive – Desert Hot Springs
Cathedral City126.31203.28126Date Palm Drive
130.18209.50130Bob Hope Drive, Ramon Road – Palm Springs
Palm Desert131.33211.36131Monterey Avenue – Thousand Palms
133Portola AvenueProposed interchange[48]
133.71215.19134Cook Street
137.27220.91137Washington Street
Indio139.16223.96139Indio Boulevard, Jefferson StreetIndio Boulevard is former US 99 south / SR 86 south
141.56227.82142Monroe Street – Central Indio
142.56229.43143Jackson Street
143.77231.38144
 Golf Center Parkway to SR 111
144.65232.79145
 SR 86 south (Expressway) – Brawley, El Centro		Eastbound exit and westbound entrance; former SR 86S
Coachella145.71234.50146

 Dillon Road to SR 86 south (Expressway) – Coachella		Signed as Dillon Road only eastbound
151Avenue 50Proposed interchange[49]
​158.82255.60Cactus City Rest Area
​161.94260.62162Frontage Road
​168.37270.97168Cottonwood Springs Road – Mecca, Twentynine PalmsFormer SR 195
​172.89278.24173Summit Road – Chiriaco Summit
​176.94284.76177Hayfield Road
​181.87292.69182Red Cloud Road
​188.83303.89189Eagle Mountain Road
Desert Center191.92308.87192
 SR 177 north (Rice Road) – Desert Center
​201.22323.83201Corn Springs Road
​216.76348.84217Ford Dry Lake Road
​221.87357.07222Wiley's Well Road
​231.94373.27232 Mesa Drive – Blythe Airport, Mesa VerdeFormer US 60 east
Blythe235.97379.76236
 SR 78 west (Neighbours Boulevard south) / I-10 BL east (Neighbours Boulevard north) – Brawley
238.97384.58239Lovekin Boulevard
239.98386.212407th Street
240.99387.84241
 US 95 north (Intake Boulevard) – Needles, Fairgrounds		Western end of US 95 overlap
242E. Hobson Way (I-10 BL)Westbound exit and entrance
242.92390.94243Riviera Drive / I-10 BL westEastbound 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 River243.31391.57California–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
  1. ^ a b Exit number follows I-5 rather than I-10.

Spur to US 101

[edit]
Interstate 10 Spur to US 101
LocationLos Angeles
Length1.0 mi (1.6 km)
Existed1964–present

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).[17] There is no direct access from the I-10 spur to I-5.[19]

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

mi[17]kmExit[50]DestinationsNotes
0.00.0—
 US 101 north (Santa Ana Freeway)		Western terminus of San Bernardino Freeway; no access to US 101 south; US 101 exit 1D
0.10.16—Mission RoadWestbound exit and eastbound entrance; also includes access from Pleasant Avenue and northbound US 101 (via exit 1D) onto entrance ramp
0.60.9719State Street to Soto StreetEastbound exit and westbound entrance
1.01.6—
 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
[edit]

There are three auxiliary Interstate Highways associated with I-10 in California:

One business loop of I-10 exists in California, running through Blythe in Riverside County.

See also

[edit]

References

[edit]
  1. ^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved November 19, 2023.
  2. ^ a b c "Interstate Highway Types and the History of California's Interstates". California Highways. Retrieved November 29, 2011.[self-published source]
  3. ^ "Interstate 10". California Highways. Retrieved November 29, 2011.[self-published source]
  4. ^ 2020 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). California Department of Transportation. January 2021. p. 30. Retrieved February 18, 2024.
  5. ^ a b Trone, Kimberly (January 11, 2002). "Freeway Signs Pay Tribute to Bono". The Desert Sun. p. B1.
  6. ^ 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.
  7. ^ 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.
  8. ^ 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.
  9. ^ "Section 310". Streets and Highways Code.
  10. ^ 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.
  11. ^ "Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  12. ^ 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.
  13. ^ 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.
  14. ^ "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  15. ^ California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved October 20, 2017.
  16. ^ 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 10, 2022.
  17. ^ a b c d e Clarion, Christian (March 17, 2020). "Interstate 10 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. Retrieved May 8, 2022.
  18. ^ a b c d e Rand McNally (2008). The Road Atlas. Chicago: Rand McNally. pp. 15, 17–19.
  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.
  20. ^ 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.
  21. ^ Dimassa, Cara Mia (November 27, 2001). "Freeway a Mess? Stop and Take a Look at Yourself". Los Angeles Times. Retrieved July 4, 2016.
  22. ^ 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.
  23. ^ https://www.gosbcta.com/wp-content/uploads/2019/09/I-10-Corridor-FINAL-ENGLISH-071019.pdf
  24. ^ Google (September 2021). "Eastbound I-10 approaching SR 111". Google Street View. Google. Retrieved May 12, 2022.
  25. ^ Google (September 2021). "Sonny Bono Mem Fwy (Eastbound I-10 near SR 86)". Google Street View. Google. Retrieved May 12, 2022.
  26. ^ a b c "Using Metro ExpressLanes". www.metroexpresslanes.net. Los Angeles County Metropolitan Transportation Authority. Retrieved August 14, 2022.
  27. ^ a b c "Map & Pricing". sbexpresslanes.com. San Bernardino County Transportation Authority. Retrieved September 2, 2024.
  28. ^ "Offers & Discounts". sbexpresslanes.com. San Bernardino County Transportation Authority. Retrieved September 2, 2024.
  29. ^ a b c "I-10 ExpressLanes Extension Project". Los Angeles County Metropolitan Transportation Authority. Retrieved September 2, 2024.
  30. ^ a b c "I-10 Express Lanes". San Bernardino County Metropolitan Transportation Authority. Retrieved September 2, 2024.
  31. ^ Rand McNally (1926). California (Map). Chicago: Rand McNally. Archived from the original on July 26, 2011. Retrieved November 29, 2011.
  32. ^ United States Numbered Highways. American Association of State Highway Officials. 1927.[full citation needed]
  33. ^ Rand McNally (1926). Los Angeles and Vicinity (Map). Chicago: Rand McNally. Archived from the original on May 25, 2011. Retrieved November 29, 2011.
  34. ^ a b "Chronology of California Highways 1915–1932". California Highways. Retrieved November 29, 2011.[self-published source]
  35. ^ Johnston, Louis; Williamson, Samuel H. (2023). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved November 30, 2023. United States Gross Domestic Product deflator figures follow the MeasuringWorth series.
  36. ^ Masters, Nathan (August 15, 2012). "L.A.'s First Freeways". KCET. Retrieved April 4, 2013.
  37. ^ "Chronology of California Highways 1933–1946". California Highways. Retrieved November 29, 2011.[self-published source]
  38. ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  39. ^ "The Northridge Earthquake: Progress Made, Lessons Learned in Seismic-Resistant Bridge Design". Public Roads. Federal Highway Administration. Summer 1994. Retrieved November 29, 2011.
  40. ^ "Metro ExpressLanes to Open on San Bernardino (10) Freeway". Los Angeles: KNBC-TV. February 22, 2013. Retrieved February 28, 2013.
  41. ^ 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.
  42. ^ "Bridge over 10 Fwy East of Coachella Collapses into Flood Waters". Los Angeles: KABC-TV. July 20, 2015. Retrieved July 20, 2015.
  43. ^ Vives, Ruben (November 11, 2023). "10 Freeway in downtown L.A. shut down indefinitely following fire". Los Angeles Times. Retrieved November 12, 2023.
  44. ^ Chow, Vivian (November 11, 2023). "Massive fire leads to indefinite closure of 10 Freeway in downtown Los Angeles". KTLA. Retrieved November 12, 2023.
  45. ^ Solis, Nathan; Vives, Ruben; Winton, Richard; Dixson, Brennon; Ahn, Ashley (November 13, 2023). "Arson is behind the massive fire that shut down the 10 Freeway, officials say". Los Angeles Times. Archived from the original on November 14, 2023.
  46. ^ Yusra Farzan; Kevin Tidmarsh; Makenna Sievertson; Mariana Dale; Frank Stoltze (November 20, 2023). "The 10 Freeway Is Now Open Again. Repairs Done Weeks Ahead Of Original Timeline". LAist.
  47. ^ "Pomona: Ganesha Blvd. Renamed". Los Angeles Times. March 22, 1990. Retrieved March 20, 2021.
  48. ^ Department of Public Works. "I-10/Portola Avenue Interchange Project". City of Palm Desert. Archived from the original on July 19, 2019. Retrieved July 19, 2019.
  49. ^ DiPierro, Amy. "A developer bought four square miles north of I-10 in Coachella for $14 million". Desert Sun. Retrieved August 8, 2019.
  50. ^ "Map of the I-10 spur (San Bernardino Freeway)" (Map). Google Maps. Retrieved May 15, 2015.
[edit]
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Interstate 10
Previous state:
Terminus 		California Next state:
Arizona
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