Interstate 10 in California

  (Redirected from I-10 (CA))

Interstate 10 (I-10) is a transcontinental Interstate Highway in the United States, stretching from Santa Monica, California, on the Pacific Ocean, 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 either the Rosa Parks Freeway, the Redlands Freeway, or the Christopher Columbus Transcontinental Highway.[4]

Interstate 10 marker

Interstate 10
Christopher Columbus Transcontinental Highway
I-10 highlighted in red
Route information
Defined by Streets and Highways Code § 310
Maintained by Caltrans
Length243.31 mi[3] (391.57 km)
ExistedAugust 7, 1947 by FHWA[1]
July 1, 1964 by Caltrans[2]–present
Major junctions
West end SR 1 in Santa Monica
East end I-10 / US 95 at Arizona state line in Ehrenberg, AZ
CountiesLos Angeles, San Bernardino, Riverside
Highway system
SR 9SR 11

Route descriptionEdit

Time-lapse video of a trip on Interstate 10 from Baldwin Park to its western terminus in Santa Monica, California
Interstate 10 begins at the McClure Tunnel in Santa Monica

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 Interstate Highway route logs that such an overlap exists for the segment of I-10 in California.[5]

I-10 is part of the California Freeway and Expressway System,[6] and is part of the National Highway System,[7] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[8] I-10 is eligible to be included in the State Scenic Highway System,[9] but it is not officially designated as a scenic highway by the California Department of Transportation.[10] 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.[11]

Santa Monica FreewayEdit

The Santa Monica Freeway is the westernmost segment of I-10 and a small section of State Route 1 (SR 1), beginning at the McClure Tunnel in Santa Monica and ending southeast of downtown Los Angeles at the East Los Angeles Interchange.

The Dosan Ahn Chang Ho Memorial Interchange, 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.

I-10 begins its eastward journey in the city of Santa Monica when SR 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 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, 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.[12][13]

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

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.[12][13]

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 (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 4 to 6 lanes, with a formal dedication held in 1966.[14]

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.[citation needed]

Due to the high traffic volume, car accidents are so common that the California Department of Transportation (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).[15]

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 FreewayEdit

Heavy traffic from downtown San Bernardino along the San Bernardino Freeway near the interchange with I-215

I-10 heads east from the Downtown Los Angeles Eastside Los Angeles region, with two high-occupancy toll (HOT) 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 I-710 interchange, these lanes merge back into the typical left lanes of each roadway.

East of I-710, I-10 continues through Monterey Park, 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.[12][13]

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

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 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.[12][16]

Riverside CountyEdit

I-10 near the SR 111, looking east with the San Gorgonio Pass wind farm in the background. Note the overhead signs reading "Indio, other Desert Cities." Also note the signage for exit 112, since renumbered to exit 111.
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 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 Sony Bono Memorial Freeway in 2002.[17] 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. 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 SR 177, a turnoff that connects to SR 62. 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.[12][16]

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.[citation needed]


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 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.[18] 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.[19] 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.[20] 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.)[21]

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.[21] 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).[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 ca. 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.

Interstate 10 eastbound near Indio

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 $13.1 million in 2019[22]). 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.[23]

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.[1] 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.[24] 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.[1] It was completed c. 1964,[25] 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.[26]

The El Monte Busway was converted to high occupancy toll (HOT) lanes in 2013 as part of the Metro ExpressLanes project.[27]

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.[28][29]

Juan Bautista de Anza National Historic TrailEdit

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.


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

  • Complete the construction of one high-occupancy vehicle lane in each direction between I-605 and SR 57.[30]
  • Add two tolled express lanes in each direction between the Los Angeles/San Bernardino County line and Ford Street in Redlands.[31]

Exit listEdit

Los AngelesSanta Monica0.000.00  SR 1 north (Pacific Coast Highway) – OxnardWestern end of SR 1 concurrency; former US 101 Alternate
1A4th Street / 5th StreetWestbound exit and eastbound entrance
0.961.541B  Lincoln Boulevard to SR 1 southEastern 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   I-405 – Sacramento, LAX Airport, Long BeachSigned as exits 3A (north) and 3B (south); former SR 7; exit 53B on I-405
4.246.824Overland Avenue / National BoulevardNo westbound signage for National Boulevard
5.058.135National BoulevardWestbound exit and eastbound entrance
5.769.276Robertson Boulevard – Culver City
6.8110.967ALa Cienega Boulevard / Venice Boulevard (SR 187 west)Venice Boulevard / SR 187 only signed westbound
7.0011.277BFairfax Avenue / Washington Boulevard
8.2713.318La Brea Avenue
9.2314.859Crenshaw Boulevard
10.1616.3510Arlington Avenue
10.6617.1611Western AvenueNo exit number westbound
12Normandie Avenue
11.6418.73Vermont Avenue
12.2519.71Hoover Street
13A-B   I-110 south / SR 110 north / Pico Boulevard – San Pedro, Pasadena, Downtown, Convention CenterDosan Ahn Chang Ho Memorial Interchange. Signed as exits 13A (south) and 13B (north) eastbound; exit 21 on I-110 / SR 110 / Harbor Freeway
13CGrand AvenueNo westbound exit
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
15.7125.2816AMateo Street / Santa Fe Avenue
16.2326.12   SR 60 east to I-5 south – Pomona, Santa AnaEastbound exit and westbound entrance; exit 1A on SR 60
Boyle AvenueEastbound exit only
   I-5 south to SR 60 east (Pomona Freeway) / Soto Street – Santa Ana, PomonaWestern end of I-5 overlap; westbound exit and eastbound entrance; eastern end of Santa Monica Freeway; exit 1E on SR 60
135A[a]Fourth Street
135B[a]Cesar Chavez AvenueEastbound exit and westbound entrance
  I-5 north – SacramentoEastern end of I-5 overlap; exit 135B-C on I-5
19AState StreetWestbound exit and eastbound entrance
  San Bernardino Freeway west to US 101 north (Santa Ana Freeway) – Los AngelesWestbound left exit and eastbound entrance
19CSoto StreetNo eastbound entrance; no exit number 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 also include ramps to/from Ramona Road; I-710 exit 22 northbound, 22A-B southbound
AlhambraI-10 Express Lanes – El Monte BuswayLeft exit and entrances; no eastbound exit
21.7034.9222Fremont Avenue – South Pasadena
22.7236.5623AAtlantic Boulevard – Monterey Park
23.3837.6323BGarfield Avenue – Alhambra
San GabrielRosemead line24.2238.9824New Avenue
24.7239.7825ADel Mar Avenue – San GabrielEastbound exit and westbound entrance for Express Lanes only; previously exit 25B
25.2340.6025BSan Gabriel Boulevard
Rosemead25.7341.4126AWalnut Grove Avenue
RosemeadEl Monte line26.3542.4126B  SR 19 (Rosemead Boulevard) – PasadenaIncludes access to/from Flair Drive eastbound
El Monte27.3544.0227Temple City BoulevardWestbound signage; previously exit 28
Baldwin AvenueEastbound signage
28.0645.1628Santa Anita Avenue – El MontePreviously exit 29
28.8946.4929APeck Road South
29BPeck Road North, Valley BoulevardWestbound exits signed as 29B (Valley Boulevard) and 29C (Peck Road North)
I-10 Express LanesEastern end of Express Lanes
29.9748.2330Garvey Avenue, Durfee AvenueWestbound exit and eastbound entrance
Baldwin Park30.54–
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 – Baldwin Park
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 Avenue – West CovinaWestbound 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 CovinaCovina line38.3961.7838BHolt Avenue
CovinaSan Dimas line39.8564.1340Via Verde
Pomona41.4166.6441Kellogg DriveNo eastbound entrance; serves Cal Poly Pomona
PomonaSan Dimas line41.8367.3242A   SR 57 (Orange Freeway) to I-210 (Foothill Freeway) – Santa AnaSigned 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 – CoronaWestbound access is via exit 44; SR 71 exit 15
Pomona43.0569.2843Fairplex DriveWestbound exit is part of exit 44; serves Los Angeles County Fair
43.5870.1444Dudley Street
44.6771.8945AWhite AvenueWestbound access is via exit 45; previously exit 45
45.1272.6145BGarey Avenue, Orange Grove Avenue – PomonaSigned as exit 45 westbound
45.8073.7146Towne Avenue
Claremont47.1375.8547Indian Hill Boulevard – Claremont
San BernardinoMontclair48.3377.7848Monte Vista Avenue
48.8978.6849Central Avenue
OntarioUpland 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 BoulevardEastbound access is via exit 54; former US 99 north
55B  Archibald Avenue – Ontario AirportSigned as exit 55 eastbound
55.8389.8556Haven Avenue
56.8491.4857Milliken Avenue
57.6092.7058  I-15 (Ontario Freeway) – Corona, San Diego, Barstow, Las VegasSigned as exits 58A (north) and 58B (south) eastbound; I-15 exit 109 northbound, 109A-B southbound
OntarioFontana line58.7994.6159Etiwanda Avenue, Valley BoulevardValley Boulevard was former US 99 south
Fontana60.8397.9061Cherry Avenue
62.84101.1363Citrus Avenue
63.88102.8064Sierra Avenue – Fontana
Bloomington66.15106.4666Cedar Avenue – Bloomington
Rialto67.33108.3668Riverside Avenue – Rialto
Colton68.36110.0169Pepper 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; western end of Redlands Freeway; I-215 exit 40A-B northbound, 40 southbound
San Bernardino72.92117.3573Waterman AvenueSigned as exits 73A (south) and 73B (north) eastbound
San BernardinoLoma Linda line73.93118.9874  Tippecanoe Avenue, Anderson Street – San Bernardino International Airport, Loma Linda University
Loma Linda74.96120.6475Mountain View Avenue – Bryn Mawr
Redlands75.96122.2576California Street
76.97123.8777AAlabama Street
77.29124.3977B   SR 210 west (Foothill Freeway) to SR 330 north – Pasadena, Running SpringsFormer SR 30 west; SR 210 exits 85A-B eastbound; future I-210
77.45124.6477CTennessee Street
78.56126.4379  SR 38 east (Orange Street) / Eureka StreetEastbound signage
  6th Street to SR 38 – Big BearWestbound signage
79.53127.9980University StreetEastbound signage
Cypress AvenueWestbound signage
80.79130.0281Ford Street, Redlands BoulevardRedlands Boulevard is former US 99 north
Yucaipa81.95131.8982Wabash AvenueWestbound exit and eastbound entrance
83.16133.8383Yucaipa Boulevard – Yucaipa
84.69136.3085Oak Glen Road, Live Oak Canyon Road
85.63137.81Wildwood Rest Area (eastbound only)
RiversideCalimesa86.84139.7687County Line Road
87.68141.1188Calimesa Boulevard – CalimesaFormer 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) – RiversideLeft exit westbound; no westbound entrance; former US 60 west
6th Street – BeaumontEastbound 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
BeaumontBanning 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
Cabazon103.36166.34103Malki RoadFormerly Fields Road
104.48168.14104Morongo Trail – CabazonFormer US 99 south; formerly Apache Trail
106.22170.94106Main Street – CabazonFormer US 99 north
111.37179.23110Railroad Avenue, Haugen–Lehmann Way – WhitewaterFormerly Verbena Avenue; previously exit 111
Palm Springs112.02180.28111  SR 111 south – Palm SpringsEastbound exit and westbound entrance; previously exit 112
113.07181.97Whitewater Rest Area
116.51187.50117  SR 62 east – Twentynine Palms, Yucca ValleySigned as "29 Palms"
119.95193.04120Indian Canyon Drive – North Palm SpringsFormerly Indian Avenue
122.96197.88123Gene Autry Trail, Palm Drive – Desert Hot Springs
Cathedral City126.31203.28126Date Palm Drive
Rancho Mirage130.18209.50130Bob Hope Drive, Ramon Road – Palm Springs
Palm Desert131.33211.36131Monterey Avenue – Thousand Palms
133Portola AvenueProposed interchange[32]
133.71215.19134Cook Street
137.27220.91137Washington Street
Indio139.16223.96139Indio Boulevard, Jefferson Street – IndioIndio 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
Coachella144.65232.79145  SR 86 south (Expressway) – Brawley, El CentroEastbound exit and westbound entrance; former SR 86S
145.71234.50146  Dillon Road to SR 86 south (Expressway) – CoachellaSigned as Dillon Road only eastbound
149Avenue 50Proposed interchange[33]
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 – Wiley's Well Rest Area
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 – Blythe
239.98386.212407th Street – Blythe
240.99387.84241  US 95 north (Intake Boulevard) – Needles, FairgroundsWestern end of US 95 overlap
242Hobsonway (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 River243.31391.57CaliforniaArizona line
   I-10 east / US 95 south – Phoenix, YumaContinuation 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 101Edit

Interstate 10 Spur to US 101
LocationLos Angeles
Length1.0 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 and 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).[3] There is no access from the I-10 spur to I-5.[13]

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

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
0.10.16Mission 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

See alsoEdit

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


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  11. ^ California Department of Transportation; California State Transportation Agency (January 2015). 2014 Named Freeways, Highways, Structures and Other Appurtenances in California. Sacramento: California Department of Transportation. pp. 25–26, 28. Archived from the original (PDF) on May 30, 2015. Retrieved May 30, 2015.
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  14. ^ 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.
  15. ^ Dimassa, Cara Mia (November 27, 2001). "Freeway a Mess? Stop and Take a Look at Yourself". Los Angeles Times. Retrieved July 4, 2016.
  16. ^ a b Thomas Brothers (1999). San Bernardino and Riverside Counties Street Guide and Directory (Map). Thomas Brothers. pp. 601, 602, 603, 604, 605, 606, 607, 608, 648, 649, 689, 690, 720, 721, 722, 723, 724, 725, 726, 756, 757, 758, 788, 390, 819, 5410, 5471, 391, 392, 5491.
  17. ^ Trone, Kimberly (January 11, 2002). "Freeway Signs Pay Tribute to Bono". The Desert Sun. p. B1.
  18. ^ Rand McNally (1926). California (Map). Chicago: Rand McNally. Archived from the original on July 26, 2011. Retrieved November 29, 2011.
  19. ^ United States Numbered Highways. American Association of State Highway Officials. 1927.[full citation needed]
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  21. ^ a b "Chronology of California Highways 1915–1932". California Highways. Retrieved November 29, 2011.[self-published source]
  22. ^ Thomas, Ryland; Williamson, Samuel H. (2020). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved September 22, 2020. United States Gross Domestic Product deflator figures follow the Measuring Worth series.
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  24. ^ "Chronology of California Highways 1933–1946". California Highways. Retrieved November 29, 2011.[self-published source]
  25. ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  26. ^ "The Northridge Earthquake: Progress Made, Lessons Learned in Seismic-Resistant Bridge Design". Public Roads. Federal Highway Administration. Summer 1994. Retrieved November 29, 2011.
  27. ^ "Metro ExpressLanes to Open on San Bernardino (10) Freeway". Los Angeles: KNBC-TV. February 22, 2013. Retrieved February 28, 2013.
  28. ^ 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.
  29. ^ "Bridge over 10 Fwy East of Coachella Collapses into Flood Waters". Los Angeles: KABC-TV. July 20, 2015. Retrieved July 20, 2015.
  30. ^ Caltrans. "San Bernardino Freeway (I-10) High Occupancy Lane Project". State of California. Retrieved November 12, 2018.
  31. ^ "I-10 Corridor Project Overview". The I-10 & I-15 Corridor Projects. Retrieved November 14, 2018.
  32. ^ Department of Public Works. "I-10/Portola Avenue Interchange Project". City of Palm Desert. Retrieved July 19, 2019.
  33. ^ DiPierro, Amy. "A developer bought four square miles north of I-10 in Coachella for $14 million". Desert Sun. Retrieved August 8, 2019.
  34. ^ Google (May 15, 2015). "Map of the I-10 spur (San Bernardino Freeway)" (Map). Google Maps. Google. Retrieved May 15, 2015.

External linksEdit

Route map:

KML is from Wikidata

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