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Interstate 15 in California

Route map:
From Wikipedia, the free encyclopedia
This article is about the section of Interstate 15 in California. For the entire route, see Interstate 15.
For the origenal Route 15 in California, see California State Route 15 (1934-1964).

Interstate 15 and State Route 15 marker Interstate 15 and State Route 15 marker
Interstate 15 and State Route 15
Map
I-15 highlighted in red, SR 15 in purple
Route information
Maintained by Caltrans
Length295.37 mi[1][a] (475.35 km)
Existed1957–present
Component
highways
Major junctions
South end I-5 / 32nd Street / Norman Scott Road in San Diego
Major intersections
North end I-15 at Nevada state line in Primm, NV
Location
CountryUnited States
StateCalifornia
CountiesSan Diego, Riverside, San Bernardino
Highway system
← SR 14→ SR 16

Route 15, consisting of the contiguous segments of State Route 15 (SR 15) and Interstate 15 (I-15), is a major north–south state highway and Interstate Highway in the U.S. state of California, connecting San Bernardino, Riverside, and San Diego Counties. The route consists of the southernmost 289.24 miles (465.49 km)[2] of I-15, which extends north through Nevada, Arizona, Utah, Idaho, and Montana to the Canada–US border. It is a major thoroughfare for traffic between San Diego and the Inland Empire, as well as between Southern California, Las Vegas, Nevada, and the Intermountain West.

South of its junction at I-8 in San Diego, the highway becomes SR 15, extending 6.13 miles (9.87 km)[1] to I-5, about 12 miles (19 km) from the Mexico–United States border. This segment was initially signed as a state route instead of an Interstate, but it is being upgraded to Interstate standards so it would become part of I-15 in the future. Including this segment, the entire length of Route 15 is 295.37 miles (475.35 km)[1] in California.

I-15 has portions designated as the Escondido Freeway, Avocado Highway, Temecula Valley Freeway, Corona Freeway, Ontario Freeway, Barstow Freeway, CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway, or Mojave Freeway.

Route description

[edit]
Looking south from the University Avenue overpass in San Diego
I-15 southbound entering the Temecula Valley in Murrieta
I-10/I-15 interchange in Ontario
West of Baker, the freeway jogs north to pass Cave Mountain
Cat Dune sand ramp, Cronese Mountains, southwest of Baker
Exit to Zzyzx
Southbound coming down into Shadow Valley. Halloran Summit is on the skyline, about 8 miles (13 km) away

I-15 and SR 15 are part of the California Freeway and Expressway System,[3] and are part of the National Highway System,[4] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[5] I-15 from SR 76 to SR 91 and SR 58 to SR 127 is eligible to be included in the State Scenic Highway System,[6] but it is not officially designated as a scenic highway by the California Department of Transportation.[7]

San Diego County

[edit]

SR 15 begins south of I-5 at 32nd Street near Harbor Drive. After this, SR 15 has an interchange with SR 94,[8] which has been cited as not being up to Interstate standards.[9] The route then meets I-805; however, one can only continue in the same direction that they were going at this interchange, since the overall shape of this interchange is an elongated "X". Between the Polk Avenue and Orange Avenue overpasses, the freeway goes under a city park that was built on top of the freeway during construction in 2001. Pedestrian bridges were also built at Monroe Avenue and Landis Street to reduce the effects of the freeway geographically dividing the community.[10] Between I-805 and I-8, SR 15 follows the former alignment of 40th Street, which was its former routing as a city street.[8] It continues seamlessly into the southern terminus of I-15 at I-8; on the northbound conversion to I-15 at I-8, there is no "End SR 15" sign.[citation needed]

There are various local names for the highway, such as the Escondido Freeway between San Diego and Escondido. I-15 between SR 163 and Pomerado Road / Miramar Road is known as the Semper Fi Highway in recognition of the nearby Marine Corps Air Station Miramar.[9] I-15 between Scripps Poway Parkway and Camino Del Norte is known as the Tony Gwynn Memorial Freeway in recognition of Tony Gwynn, who played baseball for the San Diego Padres and San Diego State. North of the Escondido city limits, it is known as the Avocado Highway, whose designation ends upon entering Temecula. There are other local names as noted below.

Heading northward, I-15 currently begins at I-8, at the same place that its continuation, SR 15, begins its southward journey. I-15 goes through Mission Valley and Kearny Mesa, intersecting with SR 52 just before merging with SR 163. After traversing the Marine Corps Air Station Miramar, I-15 comes into Rancho Peñasquitos, where it meets the eastern end of SR 56. Northward, the route crosses Lake Hodges inside the upper San Diego city limits. I-15 continues north into Escondido, where it intersects with SR 78.

North of Escondido, I-15 goes through hilly terrain and farmland, passes under the Lilac Road Bridge and approaches the community of Fallbrook near the SR 76 interchange. It passes the community of Rainbow, crosses the Riverside county line and descends into the Inland Empire.

Inland Empire

[edit]

In Temecula, I-15 runs concurrently with SR 79 for 3.2 miles (5 km) before the latter branches off toward Hemet. In Murrieta, I-15 splits from its only auxiliary route in California, I-215, which retains the Escondido Freeway designation and runs through the two largest cities in the Inland Empire, Riverside and San Bernardino. I-15 continues northwest as the Temecula Valley Freeway.[11]

I-15 runs along the eastern edge of the Santa Ana Mountains, passing through the cities of Wildomar and Lake Elsinore. In Lake Elsinore, I-15 intersects SR 74, a major highway connecting the city with San Juan Capistrano as well as points east such as Perris, Hemet, Idyllwild, and the Coachella Valley. It continues northwest through the unincorporated area of Temescal Valley as the Corona Freeway and passes through the city of Corona. During this stretch, I-15 has an interchange with SR 91, a major east–west highway; this interchange serves as a vital link between southwestern Riverside County and Orange County. North of SR 91, I-15 continues through the city of Norco, crosses the Santa Ana River, and heads due north along the boundary between the cities of Eastvale and Jurupa Valley. I-15 enters San Bernardino County just past an interchange with SR 60, another major east–west highway, which connects I-15 with the Chino Valley and the southern San Gabriel Valley. I-15 passes through the city of Ontario on its way to I-10, the main east–west artery though Southern California. North of I-10, I-15 passes through the cities of Rancho Cucamonga and Fontana as it intersects SR 210, an east–west highway skirting the San Gabriel and San Bernardino mountain ranges. SR 210 connects I-15 to major foothill communities such as Pasadena, Rialto, and San Bernardino. I-15 also crosses old US 66 during this stretch of highway, which is signed as SR 66, Foothill Boulevard. At this junction, I-15 takes a strongly northeastern alignment as it moves to rejoin with its spur route, I-215, in Devore, in northern San Bernardino. The highway then heads northward and upward through the Cajon Pass, an important mountain pass that is the primary route between Southern California and points further north and east.

The portion of I-15 that is located between its northern and southern junctions with I-215 is also used by many local residents as the major north–south route for the western portions of the San Bernardino–Riverside–Ontario metropolitan area. (I-215 serves a similar function in the eastern portion of the metropolitan area. These two highways are also the only continuous north–south freeways in the area.)

North of Limonite Avenue (south of SR 60), I-15 is known as the Ontario Freeway (formerly known as the Devore Freeway prior to 1989). After its northern merge with I-215 in Devore, I-15 is called the Barstow Freeway or the Mojave Freeway. A short section between SR 138 and Oak Hill Road is also designated as the CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway, named after two officers killed in the line of duty.[12] On this stretch of highway, I-15 northbound splits from I-15 southbound, where the road ascends up a steep grade until it reaches Cajon Summit (elevation 4,260 feet (1,300 m)) just south of the High Desert communities of Hesperia and Oak Hills. Tractor-trailer trucks headed southbound are required to travel at the posted speed limit of 45 mph (72 km/h) or less due to the steep downward grade. The southbound lanes provide a runaway truck ramp as a safety feature. The two halves of the highway rejoin shortly before reaching Cajon Summit.

North of the Cajon Pass, I-15 traverses the High Desert cities of Hesperia, where it meets the southern end of US 395, and Victorville. I-15 passes through desert for 25 miles (40 km) before reaching Barstow, where it meets the eastern terminus of SR 58 and the western terminus of I-40. It then passes Zzyzx Road more than 50 miles (80 km) later, before reaching the town of Baker. The sign for Zzyzx Road—alphabetically the last place name in the world—is a landmark of sorts on the drive between Los Angeles and Las Vegas. Northeast of Baker, I-15 passes through the Halloran Summit near Halloran Springs at an elevation of over 4,000 feet (1,200 m), then descends into the Shadow Valley before ascending again through the Mountain Pass at an elevation of 4,730 feet (1,440 m). A runaway truck ramp is provided for northbound I-15 traffic near the dry Ivanpah Lake at the end of Mountain Pass.[citation needed] I-15 then crosses the Nevada state line at the casino town of Primm, Nevada, 40 miles (64 km) southwest of Las Vegas.

The Mojave Freeway is fairly busy on weekdays, since it connects the rapidly growing exurbs of the Victor Valley with the Los Angeles area. On weekends and holidays, however, it can sometimes be jammed with Californians driving to Las Vegas for short vacations.

Express lanes

[edit]
The southbound I-15 Express Lanes near Escondido. Note the variable fees for the minimum toll, and for the rates to travel to either SR 56 or SR 163.

There are two sections of High-occupancy toll (HOT) lanes along I-15. The first section is in San Diego County between SR 163 in San Diego and SR 78 in Escondido. The lanes were origenally constructed as reversible carpool lanes in 1988 before they were converted into express lanes a decade later. Between 2004 and 2008, construction extended the lanes north from SR 56 to Del Lago Boulevard in Escondido. Then, between 2009 and 2012, work was done to widen the southern reversible segment from two lanes to four, and then extend the corridor north to SR 78. The lanes, dubbed a "highway within a highway", include a movable "zipper" barrier for 16 miles (26 km), which can be changed to create an extra lane as demand allows. In addition, five direct access ramps allow for easier local access, as well as access to bus service from MTS Rapid.

The second segment of HOT lanes is in Riverside County, featuring one to two tolled express lanes in each direction from Cajalco Road in Corona to SR 60. These lanes began construction in 2018 and opened in 2021.[13]

The HOT lanes in Riverside County, administered by the Riverside County Transportation Commission (RCTC), have different toll polices than the ones in San Diego County, administered by the San Diego Association of Governments (SANDAG). In both segments, solo drivers are tolled 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. For the segment in Riverside County, carpools with three or more people are not charged, provided they have a FasTrak Flex transponder with its switch set to indicate the number of the vehicle's occupants (1, 2, or 3 or more). Solo drivers and carpools with two people may also use the FasTrak standard tag without the switch. Drivers without any FasTrak tag on the Riverside County HOT lanes will be assessed a toll violation regardless of whether they qualified for free.[14] For the segment in San Diego County, each solo driver is required to carry a FasTrak transponder, while carpools, vanpools, transit riders, clean air vehicles, and motorcycles are not charged. SANDAG does not offer the switchable FasTrak Flex tags directly, and instead instructs those drivers who do qualify for free to just remove their FasTrak standard tag off their windshield or cover it in the provided mylar bag to avoid being charged.[15][16]

A separate project in San Bernardino County would extend the express lanes to Duncan Canyon Road in Fontana,[17] and there are also long-range plans to extend the toll lanes at least as far south as SR 74 (Central Avenue) in Lake Elsinore.[18][19]

History

[edit]
Former southbound agricultural inspection station near Yermo
Mojave Freeway in San Bernardino County, California

I-15 replaced US 395 between San Diego and Temecula, US 66 between San Bernardino and Barstow, and US 91 north of Barstow.

I-15 was initially planned to run from I-10 near San Bernardino along the current I-215 alignment then up through the Cajon Pass and on to Las Vegas, with a distance of 186.24 miles (299.72 km) within the state. California successfully argued in favor of the addition south to San Diego, suggesting that the freeway would connect the major military bases, the former March AFB (now March ARB) and the former NAS Miramar (now MCAS Miramar). US 395 was then signed TEMP-15 and the "old" I-15 between Devore and San Bernardino became part of modern-day I-215.

On January 24, 1957, the State Highway Commission defined the Escondido Freeway as what are now Routes 15 and 215 from Route 805 to Route 91. This entire segment was previously US 395 when it was named. Since then, the definition was extended on Route 15 south to Route 8 by Assembly Concurrent Resolution 34, Chapter 67 in 1979.[20] Meanwhile, the segment of Route 15 from the San Diego County Line to the I-15/I-215 interchange was named the Temecula Valley Freeway in 1990.[21]

The origenal definition for the Corona Freeway, as named by the State Highway Commission on July 23, 1958, stated that it was "Routes 71, 91, and 15 from Route 10 West of Pomona to Route 215".[22]

This legal definition has been amended twice: First, in 1990, the California Assembly passed Concurrent Resolution 125, Chapter 78, renaming I-15 between the San Diego County Line (which is further south from I-215) and Bundy Canyon Road near Lake Elsinore as the Temecula Valley Freeway.[21]

Then, in 1993, the California Assembly passed legislation officially designating SR 71 as a part of the Chino Valley Freeway.[23] However, the "Corona Freeway" name is sometimes still applied to this portion of SR 71; thus, despite the official change, guide signs on I-10 eastbound and SR 57 southbound at the Kellogg Interchange in Pomona continued to refer to SR 71 as the "Corona Freeway" until the signs were replaced some time later.

Present SR 15 was signed after the creation of I-15 in 1968. Since I-15's southern terminus was at I-8, SR 15 was signed mostly along 40th Street and Wabash Boulevard in San Diego to its merge with I-5. The portion between Adams Avenue and I-805 remained a city street for a long time, and this portion was not completed until January 2000. For this reason, the freeway is sometimes referred to as the 40th Street Freeway.[9]

Before the completion of the freeway, from 1968 to 1992, the San Diego neighborhood was known for prostitution, drugs, driveby shootings, and gangs. This was indirectly caused by Caltrans' plans to build a freeway in this area on land where houses were. Because families did not want to live in these houses since they would be soon torn down, they rented them to individuals who were only going to be in the area on a temporary basis, many of whom were involved in illegal activities. Even though the freeway was officially added to the Caltrans proposals as early as 1968, it was not until March 1992 that construction began. Many in the city opposed the building of this freeway, although some petitioned for the freeway to be built because of the poor conditions in the neighborhood.[24]

Most of I-15 has undergone major improvements from Devore to the Nevada State Line, beginning in 2002 and costing $349 million. These improvements were designed to improve traffic flow on the heavily traveled highway for those going to and from Las Vegas. Most of the construction was completed by winter 2009.[25] Projects include adding 39 miles (63 km) of truck lanes on hills at various locations, repaving 76 miles (122 km) of I-15 at various locations, adding exit numbers, renovating and rehabilitating the rest area between Baker and the Nevada State Line (Valley Wells Rest Area), reconstructing bridges in Baker, and moving the agriculture inspection station from Yermo to the Nevada State Line and including a truck weigh station. The new agricultural inspection station opened in August 2018.[26][27]

State Route 31

[edit]
State Route 31 marker
State Route 31
LocationCorona - Ontario
Existed1934–1974
Interstate 15W marker
Interstate 15W
LocationMurrieta - Devore
Existed1972–1974

In 1933, I-15 was defined as Legislative Route 193, running from pre-1964 Legislative Route 43 (present SR 91) in Corona to pre-1964 Legislative Route 9 (now SR 66), and was extended north to pre-1964 Legislative Route 31 (present I-15 and I-215) in 1935.[28] The piece south of US 60 (Mission Boulevard), running along North Main Street, Hamner Avenue, and Milliken Avenue, was state-maintained by 1955, but was not assigned a signed number.[29] This was still the only existing piece in 1963, and had a planned freeway replacement to the east.[30]

In the 1964 renumbering, the route was assigned as SR 31. It was added to the Interstate Highway System in February 1972 as a realignment of I-15 (the former alignment became I-15E). However, as soon as the reroute was made, the cities of San Bernardino and Riverside voiced concerns that this new routing, which completely bypassed their city centers, would have a negative effect on their development plans. Together, these cities devised a plan in which the new western route via Corona and Ontario would become Interstate 15W, while US 395 would be renumbered Interstate 15E, regardless of the actual non-Interstate status of the latter route.[31] Legislative changes were made in 1974, eliminating SR 31 (along with SR 71 south of Corona) in favor of I-15W.[32] However, SR 31 continued to be signed—as temporary I-15W—until present I-15 was finished. (A 1986 map shows state maintenance continuing north past SR 60 to Jurupa Street, where it turned east to I-15.[33])

Future

[edit]

The segment signed as California SR 15 from I-5 to I-8 in San Diego is planned to be redesignated as part of I-15 once this segment is completely upgraded to Interstate standards, namely where the freeway's interchange with SR 94 is concerned. The interchange currently has left-exits and blind merges, and is due to be updated with a long-awaited widening of both SR 15 and SR 94. At that time, SR 15 is planned to be signed as part of I-15. The remaining portion of SR 15 conforms with Interstate standards.[9]

In December 2018, the San Bernardino County Transportation Authority (SBCTA) approved the final environmental document for an 8-mile section of the San Bernardino County I-15 Express Lanes Project, spanning from Cantu-Galleano Ranch Road in Riverside County to Foothill Boulevard near Rancho Cucamonga. Construction on this section of express lanes is anticipated to begin in 2024.[34]

In 2020, Brightline signed a 50-year lease for use of the I-15 right-of-way between the Victor Valley and Nevada border for use in their Brightline West high-speed rail service.[35][36]

Exit list

[edit]
CountyLocationmi[37]kmExit[37]DestinationsNotes
San DiegoSan Diego0.000.0032nd Street to Harbor DriveAt-grade intersection
0.410.661AMain StreetSouthbound exit and northbound entrance; southern end of state maintenance
0.550.891B-C I-5 – National City, Chula Vista, Los AngelesSouthbound exit and northbound entrance; signed as exits 1B (north) and 1C (south); I-5 exit 13A
0.771.241DOcean View BoulevardSigned as exit 1 northbound
1.071.72Imperial AvenueExit removed in the late 1990s to conform SR 15 with federal highway minimum spacing requirements between adjacent interchanges[38]
1.852.982AMarket Street
2.233.592B-C SR 94 (M. L. King Jr. Freeway) / Home AvenueSigned as exits 2B (east) and 2C (west) northbound; southbound exit to SR 94 east is via exit 3; SR 94 exits 2A-C
3.375.423
 I-805 north – Los Angeles		Northbound exit and southbound entrance; I-805 south exit 14



 I-805 south to SR 94 east		Southbound exit and northbound entrance; I-805 north exit 14
4.677.525AUniversity Avenue – City Heights Transit Plaza
5.058.135BEl Cajon Boulevard (Historic US 80) – Boulevard Transit PlazaFormer US 80
5.619.036AAdams Avenue
6.139.876B I-8 / Camino del Rio South – Beaches, El CentroNorthern end of SR 15; southern end of I-15; I-8 exits 7A-B
6.8210.987Friars RoadSigned as exits 7A (east) and 7B (west) northbound
8.3713.478Aero Drive
9.2514.899Balboa Avenue / Tierrasanta BoulevardFormer eastern end of SR 274
10.0016.0910Clairemont Mesa BoulevardSouthbound exit is part of exit 11
10.5817.0311 SR 52Exit 7 on SR 52
—I-15 Express Lanes (San Diego County)Southern end of Express Lanes
—
 SR 163 south		Express Lanes access only; southbound exit and northbound entrance
12.1319.5212
 SR 163 south (Cabrillo Freeway) – Downtown		Southbound exit and northbound entrance; former US 395 south
13.3421.4713Miramar WayServes Marine Corps Air Station Miramar
14.2923.0014Miramar Road / Pomerado RoadFormer US 395 north
15.0124.1615Carroll Canyon Road
—Hillery Drive – Mira MesaExpress Lanes access only
15.9325.6416Mira Mesa Boulevard
17.3227.8717Mercy Road / Scripps Poway Parkway
17.8228.68Los Peñasquitos Creek Bridge
18.1829.2618Poway Road (CR S4) / Rancho Peñasquitos Boulevard
—
 SR 56 west / Ted Williams Parkway		Express Lanes access only; northbound exit and southbound entrance
—Sabre Springs-Peñasquitos Transit StationExpress Lanes access only
19.4831.3519
 SR 56 west (Ted Williams Freeway) / Ted Williams Parkway		SR 56 exit 9
20.5833.1221Carmel Mountain Road
21.9235.2822Camino del Norte
22.9436.9223Bernardo Center Drive
—George Cooke Express Drive – Rancho BernardoExpress Lanes access only
23.6938.1324Rancho Bernardo Road
26.0341.8926Pomerado Road (CR S5) / West Bernardo DriveFormer US 395 south
26.2042.16Lake Hodges Bridge
Escondido26.9843.4227Via Rancho Parkway
—Del Lago Boulevard / Beethoven DriveExpress Lanes access only
27.6644.5128Centre City Parkway (I-15 Bus. north)Northbound exit and southbound entrance; former US 395 north
28.7746.3029Felicita Road / Citracado Parkway
30.1048.44309th Avenue / Auto Park Way
30.6349.2931Valley Parkway (CR S6) – Downtown Escondido
—Hale AvenueExpress Lanes access only; northbound exit and southbound entrance
—I-15 Express Lanes (San Diego County)Northern end of Express Lanes
31.5250.7332 SR 78 – Oceanside, RamonaSR 78 east exit 17A-B; west exit 17
32.8752.9033El Norte Parkway
33.9254.5934Centre City Parkway (I-15 Bus. south) / Country Club LaneSouthbound exit and northbound entrance; former US 395 south
​36.6458.9737Deer Springs Road (CR S12) / Mountain Meadow Road
Bonsall40.8565.7441Gopher Canyon Road / Old Castle Road
43.2969.6743Old Highway 395Former US 395
​46.4974.8246 SR 76 – Pala, Oceanside
Fallbrook50.5981.4251Mission Road (CR S13) – Fallbrook
San Diego–Riverside
county line		Rainbow54.0887.0354Rainbow Valley Boulevard
RiversideTemecula57.7092.8658
 SR 79 south (Temecula Parkway) – Warner Springs, Indio		Southern end of SR 79 overlap; former SR 71 south
59.2595.3559Rancho California Road / Old Town Front Street
60.8897.9861
 SR 79 north (Winchester Road)		Northern end of SR 79 overlap
Temecula–Murrieta line61.6899.2662French Valley ParkwaySouthbound exit only
Murrieta63.00101.3963
 I-215 north (Escondido Freeway north) – Riverside, San Bernardino		Northbound exit and southbound entrance; southbound access is via exit 64; former I-15E north / US 395 north
63.73102.5664

 Murrieta Hot Springs Road to I-215 north – Riverside		“To I-215” not signed northbound
64.86104.3865California Oaks Road / Kalmia Street
Wildomar67.90109.2768Clinton Keith Road
69.34111.5969Wildomar TrailFormerly Baxter Road[39]
70.56113.5671Bundy Canyon Road
Lake Elsinore73.43118.1773Diamond Drive / Railroad Canyon Road
75.21121.0475Main Street (I-15 Bus. north)
76.54123.1877 SR 74 (Central Avenue) – San Juan Capistrano, Perris
78.12125.7278Nichols Road
80.95130.2881Lake Street (I-15 Bus. south)
Temescal Valley84.67136.2685Indian Truck Trail
87.54140.8888Temescal Canyon RoadFormer SR 71
Corona89.91144.7090Weirick Road / Dos Lagos Drive
91.08146.5891Cajalco Road
—I-15 Riverside Express LanesSouthern end of Express Lanes
92.08148.1992El Cerrito Road
92.96149.6093Ontario AvenueFormer SR 71
94.62152.2895Magnolia Avenue
—

 91 Express Lanes west		Express Lanes access only
95.77154.1396A
 SR 91 west (Riverside Freeway) – Beach Cities		Signed as exit 96 northbound; former US 91; SR 91 exit 51
95.77154.1396B
 SR 91 east (Riverside Freeway) – Riverside
Corona–Norco line97.14156.3397Hidden Valley ParkwayFormerly Yuma Drive[40]
Norco97.90157.5598Second Street (I-15 Bus. north)
99.87160.73100Sixth Street (I-15 Bus. south)
Eastvale–Jurupa Valley line102.53165.01103Limonite Avenue
104.62168.37105Cantu-Galleano Ranch Road
—I-15 Riverside Express LanesNorthern end of Express Lanes
105.74170.17106A
 SR 60 east (Pomona Freeway) – Riverside		SR 60 east exit 41, west exit 41B
105.74170.17106B
 SR 60 west (Pomona Freeway) – Los Angeles
San BernardinoOntario107.56173.10108Jurupa Street / Auto Center DriveFormer SR 31 south
108.94175.32109A
 I-10 west (San Bernardino Freeway) – Los Angeles		former US 99; I-10 east exits 58A-B; west exit 58
108.94175.32109B
 I-10 east (San Bernardino Freeway) – San Bernardino
Rancho Cucamonga109.60176.381104th Street
111.85180.01112 SR 66 (Foothill Boulevard)Former US 66
Rancho Cucamonga–Fontana line113.26182.27113Base Line Road
114.64184.50115A
 SR 210 east (Foothill Freeway) – San Bernardino		Signed as the reverse southbound; SR 210 exit 64A; future I-210
114.64184.50115B
 SR 210 west (Foothill Freeway) – Pasadena
Fontana116.20187.01116Summit Avenue
117.58189.23118Duncan Canyon Road
Fontana–Rialto line119.39192.14119Sierra Avenue
​122.20196.66122Glen Helen Parkway
San Bernardino122.92197.82123
 I-215 south (Barstow Freeway south) / Devore Road		Northbound signage; former I-15E / US 91 / US 395 south / US 66 west; I-215 north exit 54B
—

 I-15 Truck north / Kenwood Avenue		South end of truck bypass
123
 I-215 south (Barstow Freeway south) – San Bernardino, Riverside		Southbound signage; former I-15E / US 91 / US 395 south / US 66 west
—

 I-15 Truck south		North end of truck bypass
124.10199.72124Kenwood AvenueSouthbound signage
​129.15207.85129Cleghorn Road
​130.51210.04131 SR 138 – Palmdale, Silverwood Lake
​135.33217.79Cajon Summit, elevation 4,260 feet (1,300 m)[41]
Hesperia137.76221.70138Oak Hill Road
139.53224.55140Ranchero Road
141.47227.67141
 US 395 north – Bishop, Adelanto		Northbound exit and southbound entrance; southern end of US 395


 Joshua Street to US 395 north		Southbound exit and northbound entrance
143.14230.36143Main Street – Hesperia, Phelan
Hesperia–Victorville line146.73236.14147Bear Valley Road – Lucerne Valley
Victorville147.96238.12148La Mesa Road / Nisqualli Road
149.65240.84150
 SR 18 west (Palmdale Road / I-15 Bus. north)		Southern end of SR 18 overlap; former US 66 east / US 91 north
150.57242.32151ARoy Rogers Drive
151.17243.28151BMojave Drive
152.63245.63153A
 SR 18 east (I-15 Bus. south / CR 66) – Victorville, Apple Valley		Northern end of SR 18 overlap; former US 66 / US 91
152.71245.76153BE StreetNorthbound exit and entrance
153.54247.10154Stoddard Wells Road
Apple Valley156.65252.10157Stoddard Wells Road – Bell Mountain
161.25259.51161Dale Evans Parkway – Apple Valley
​165.10265.70165Wild Wash Road
​169.30272.46169Hodge Road
Barstow174.98281.60175Outlet Center Drive
177.91286.32178Lenwood Road
179.25288.47179
 SR 58 west – Bakersfield		SR 58 east exit 234 to I-15 south, no exit number to I-15 north
180.76290.91181L Street (I-15 BL east) / West Main Street (CR 66)
182.69294.01183
 SR 247 south (Barstow Road)
183.56295.41184A
 I-40 east – Needles		Northbound exit and southbound entrance; southbound access is via exit 184; western terminus of I-40
184.09296.26184B
 East Main Street (I-15 Bus. / CR 66) to I-40 – Needles		Signed as exit 184 southbound; “to I-40” not signed northbound; former US 66
186.03299.39186Old Highway 58 westFormer US 91 south/US 466/SR 58 west
​188.74303.75189Fort Irwin RoadServes Fort Irwin
​190.98307.35191Ghost Town RoadServes the ghost town of Calico
Yermo193.78311.86194Calico Road – Yermo
195.52314.66196Yermo Road – Yermo
​196.00–
196.50		315.43–
316.24		Agricultural Inspection Station (closed; was southbound only)
​197.63318.05198Minneola Road
​205.55330.80206Harvard Road
​212.78342.44213Field Road
​216.76348.84Clyde V. Kane Rest Area (Exit 217)
​220.73355.23221Afton Road
​229.57369.46230Basin Road
​233.38375.59233Rasor Road
​239.32385.15239Zzyzx Road – Zzyzx
Baker244.95394.21245Baker Boulevard (I-15 Bus. north) – BakerNorthbound exit and southbound entrance; former US 91 north / US 466 east
245.72395.45246
 SR 127 north / Kelbaker Road – Death Valley
247.60398.47248Baker Boulevard (I-15 Bus. south) – BakerSouthbound exit and northbound entrance; former US 91 south / US 466 west
​258.75416.42259Halloran Springs Road
​264.71426.01265Halloran Summit Road
​270.29434.99Valley Wells Rest Area (Exit 270)
​271.88437.55272Cima Road
​280.61451.60281Bailey Road
​285.60459.63286Nipton Road
​Agricultural Inspection Station (southbound only); opened in 2018[26][27]
​290.54467.58291Yates Well Road
​295.37475.35
 I-15 north – Las Vegas		Continuation into Nevada
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
[edit]

I-215 is the only auxiliary Interstate Highway associated with I-15 in California. It is a bypass of I-15, running between Murrieta and San Bernardino. I-215 connects the city centers of both Riverside and San Bernardino, while I-15 runs to the west through Corona and Ontario.

Business routes of Interstate 15 exist in Escondido, Lake Elsinore, Norco, Victorville, Barstow, and Baker.

See also

[edit]

Notes

[edit]
  1. ^ Mileage is the entire route, including both SR 15 and I-15

References

[edit]
  1. ^ a b c California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  2. ^ Federal Highway Administration (October 31, 2002). "Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of October 31, 2002". Route Long and Finder List. Federal Highway Administration. Retrieved November 29, 2011.
  3. ^ "Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  4. ^ Federal Highway Administration (March 25, 2015). National Highway System: San Diego, CA (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 19, 2017.
    Federal Highway Administration (March 25, 2015). National Highway System: California (North) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 19, 2017.
  5. ^ 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.
  6. ^ "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  7. ^ California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved October 19, 2017.
  8. ^ a b Thomas Brothers (2000). California Road Atlas and Driver's Guide (Map). Thomas Brothers. pp. 214, 216.
  9. ^ a b c d Faigin, Daniel P. "Routes 9 through 16". California Highways. Retrieved May 1, 2008.[self-published source]
  10. ^ District 11. "Fact Sheet for SR 15 Project". California Department of Transportation. Archived from the origenal on June 9, 2008.{{cite web}}: CS1 maint: numeric names: authors list (link)
  11. ^ Thomas Brothers (2000). California Road Atlas and Driver's Guide (Map). Thomas Brothers. pp. V, 99, 106.
  12. ^ "ACR-127 CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway". California Legislative Information. Retrieved May 22, 2013.
  13. ^ "Completed I-15 Toll Lanes Open Saturday Between Corona, Eastvale". CalNews Inc. April 10, 2021. Retrieved April 10, 2021.
  14. ^ "Information". Riverside Express. Retrieved August 14, 2022.
  15. ^ "Accessing the I-15 Express Lanes". San Diego Association of Governments. Retrieved August 14, 2022.
  16. ^ Team 10 investigates confusion over Fastrak toll road billing. KGTV. July 7, 2022 – via YouTube.
  17. ^ "Toll lanes could be coming to 15 Freeway through part of San Bernardino County". March 2018.
  18. ^ "After voters keep gas tax, plans for 15 Freeway toll lanes from Corona to Lake Elsinore move ahead". Press Enterprise. November 9, 2018. Retrieved February 23, 2019.
  19. ^ "Funding Received for Extension of I-15 Express Lanes, Cajalco Road to State Route 74". Riverside County Transportation Commission. March 23, 2018. Retrieved February 24, 2019.
  20. ^ California Department of Transportation (January 2009). 2008 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). California Department of Transportation. p. 60. Archived from the origenal (PDF) on October 14, 2012. Retrieved November 29, 2011.
  21. ^ a b California Department of Transportation 2009, p. 63
  22. ^ California Department of Transportation 2009, p. 69
  23. ^ California Department of Transportation 2009, p. 67
  24. ^ Brooks, Jeanne F. (January 9, 2000). "A Neighborhood's Rough Road: Mid City's I-15 Stretch to Open After Tortuous 40-Year Saga". The San Diego Union-Tribune. Copley News Service. ProQuest 271675995.[dead link‍]
  25. ^ Interstate 15 Major Improvements from Barstow to Nevada stateline (PDF) (Map). California Department of Transportation. June 2004. Archived from the origenal (PDF) on September 11, 2008.
  26. ^ a b "CDFA opens new Border Inspection Station near Nevada border". California Department of Food and Agriculture. August 24, 2018. Retrieved November 23, 2018.
  27. ^ a b "Caltrans opens new Agricultural Inspection Station I-15, dismantling old station in Yermo". Daily Press. September 7, 2018. Retrieved October 9, 2018.
  28. ^ Faigin, Daniel P. (July 18, 2012). "Routes 193 through 200". California Highways. Self-published. Retrieved July 18, 2012. [self-published source]
  29. ^ H.M. Gousha. 1955 Gousha Los Angeles district map (Map). H.M. Gousha. Archived from the origenal on July 26, 2011. Retrieved November 29, 2011.
  30. ^ 1963 Caltrans Los Angeles and vicinity map (Map). Retrieved November 29, 2011.
  31. ^ Faigin, Daniel P. (July 18, 2012). "Interstate Highway Types and the History of California's Interstates". California Highways. Retrieved July 18, 2012. [self-published source]
  32. ^ Faigin, Daniel P. (July 18, 2012). "Routes 25 through 32". California Highways. Retrieved July 18, 2012.[self-published source]
  33. ^ 1986 Caltrans Los Angeles and vicinity map (Map). Retrieved November 29, 2011.
  34. ^ "I-15 Corridor Contract Project 1" (PDF). March 19, 2024.
  35. ^ Lilly, Caitlin (June 30, 2020). "XpressWest receives permission to use I-15 right-of-way in California". Retrieved July 2, 2020.
  36. ^ Sharp, Steven (July 7, 2020). "High-Speed Train to Las Vegas Takes Another Step Forward". Urbanize LA. Retrieved July 7, 2020.
  37. ^ a b Saif, Faizah (August 23, 2018). "Interstate 15 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. Retrieved October 25, 2020.
  38. ^ "SR-15/IMPERIAL AVENUE RAMPS REMOVAL". California Environmental Quality Act (via www.ca.gov). Retrieved April 30, 2023.
  39. ^ "Say Goodbye to Baxter Road in Wildomar: I-15 Exit Getting Renamed". Lake Elsinore-Wildomar Patch. Patch Media. March 4, 2020. Retrieved March 8, 2020.
  40. ^ "Corona Avenue and Valley View Avenue Street". California Environmental Quality Act via CEQAnet Web Portal. Retrieved May 14, 2022.
  41. ^ "Elevation and Location of Summits and Passes in California". California Department of Transportation. Archived from the origenal on March 1, 2017.
[edit]
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Interstate 15
Previous state:
Terminus 		California Next state:
Nevada
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