Interstate 15 in California

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Interstate 15 markerState Route 15 marker

Interstate 15 and State Route 15
SR 15 and I-15 highlighted in red
Route information
Defined by Streets and Highways Code § 315
Length295.37 mi[1][a] (475.35 km)
Major junctions
South end I-5 / 32nd Street / Norman Scott Road in San Diego
North end I-15 at Nevada state line in Primm, NV
CountiesSan Diego, Riverside, San Bernardino
Highway system
SR 14SR 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 Interstate 8 in San Diego, the highway becomes SR 15, extending 6.13 miles (9.87 km)[1] to Interstate 5, about 12 miles (19 km) from the Mexican 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.

Interstate 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 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 geometry of this interchange results in the overall shape of an "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.[11]

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, also known as Mr. Padre, who played for the San Diego Padres. 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, SR 79 runs concurrently with I-15 for 3.2 miles (5 km) before it branches off toward Hemet. In Murrieta, I-15 splits from its only spur route in California, I-215, which retains the Escondido Freeway designation and runs through the two largest cities in the Inland Empire, San Bernardino and Riverside. I-15 continues north as the Temecula Valley Freeway.[12]

West of Baker, the freeway jogs north to pass Cave Mountain.

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 suburban area of Temescal Valley as the Corona Freeway and passes through the city of Corona. During this stretch, I-15 intersects 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 bedroom communities of Norco and Eastvale, while skirting the western edge of the city of Jurupa Valley. I-15 enters San Bernardino County just past its interchange with SR 60, another major east–west highway, which connects I-15 with the Chino 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 Route 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 northwards and upward through the Cajon Pass, an important mountain pass that is the primary route between Southern California and points further north and east.

Interchange at I-10 and I-15

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 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. 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.[13] 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) 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 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.

Exit to Zzyzx

North of the Cajon Pass, I-15 traverses the High Desert cities of Hesperia and Victorville. I-15 passes through desert for 25 miles (40 km) before reaching Barstow, 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. I-15 reaches the Nevada state line near the casino town of Primm, Nevada.

Former southbound agricultural inspection station near Yermo
Southbound coming down into Shadow Valley. Halloran Summit is on the skyline, about 8 miles (13 km) away.

I-15 continues thereafter to Las Vegas, Salt Lake City, and on into Idaho and Montana, before ending at the Canada–US border, where Alberta Highway 4 continues the ribbon of asphalt into Canada. Because it joins with the western end of I-70 in Southwestern Utah, I-15 also forms part of a major east–west corridor connecting Southern California with Denver, St. Louis, and points east.

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.[b]

Express lanes[edit]

There are high-occupancy toll lanes in the center of I-15 from SR 163 to SR 78; solo drivers are required to pay a toll using a FasTrak transponder.[14]

The lanes were constructed as reversible carpool lanes in 1988; a decade later, they were converted into express lanes. 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.

Construction is underway to add one to two tolled express lanes in each direction from Cajalco Road to SR 60. This project is expected to be complete by late 2020.[15] A separate project in San Bernardino County would extend the express lanes to just north of Duncan Canyon Road.[16] Longer-range plans include extending the toll lanes at least as far south as SR 74 (Central Avenue) in Lake Elsinore.[17][18]


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 U.S. Route 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.[19] 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.[20]

The original 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".[21]

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 Interstate 215) and Bundy Canyon Road near Lake Elsinore as the Temecula Valley Freeway.[20]

Then in 1993, the California Assembly passed legislation officially designating State Route 71 as a part of the Chino Valley Freeway.[22] However, the "Corona Freeway" name is sometimes still applied to this portion of State Route 71; thus, despite the official change, guide signs on I-10 eastbound and SR 57 southbound at the Kellogg Interchange in Pomona still refer to SR 71 as the "Corona Freeway".

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 Interstate 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 neighborhood was known for prostitution, drugs, drive-by 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.[23]

Most of Interstate 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.[24] 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.[25][26]

State Route 31[edit]

State Route 31
LocationCorona - Ontario

Interstate 15W
LocationMurrieta - Devore

In 1933, Interstate 15 was defined as Legislative Route 193, running from pre-1964 Legislative Route 43 (present State Route 91) in Corona to pre-1964 Legislative Route 9 (now State Route 66), and was extended north to pre-1964 Legislative Route 31 (present I-15 and I-215) in 1935.[27] The piece south of U.S. Route 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.[28] This was still the only existing piece in 1963, and had a planned freeway replacement to the east.[29]

In the 1964 renumbering, the route was assigned as State Route 31. It was added to the Interstate Highway System in February 1972 as a realignment of Interstate 15 (the former alignment became Interstate 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.[30] Legislative changes were made in 1974, eliminating SR 31 (along with State Route 71 south of Corona) in favor of I-15W.[31] However, SR 31 continued to be signed—as temporary Interstate 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.[32])


The segment signed as California State Route 15 from Interstate 5 to Interstate 8 in San Diego is planned be re-designated 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 be resigned as part of I-15. The remaining portion of SR 15 conforms with Interstate standards.[9]

In 2020, Virgin Trains USA signed a 50-year lease for use of the Interstate 15 right-of-way between the Victor Valley and Nevada border for use in their XpressWest high-speed rail service.[33][34]

Exit list[edit]

San DiegoSan Diego0.000.0032nd Street to Harbor DriveAt-grade intersection
1AMain StreetSouthbound exit and northbound entrance; southern end of state maintenance
1B-C I-5 – National City, Chula VistaSouthbound exit and northbound entrance; signed as exits 1B (north) and 1C (south); exit 13A on I-5
0.600.971DOcean View Boulevard / Imperial AvenueSigned as exit 1 northbound
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; exits 2A-C on SR 94
3.375.423 I-805 north – Los AngelesNorthbound exit and southbound entrance; exit 14 on I-805
I-805 south to SR 94 eastSouthbound exit and northbound entrance; exit 14 on I-805
4.667.505AUniversity Avenue – City Heights Transit Plaza
5.078.165BEl Cajon Boulevard (Historic US 80) – Boulevard Transit PlazaFormer US 80
5.649.086AAdams Avenue
6.139.876B I-8 / Camino del Rio South – Beaches, El CentroNorthern end of SR 15; southern end of I-15; exits 7A-B on I-8
6.8210.987Friars Road – SDCCU StadiumSigned as exits 7A (east) and 7B (west) northbound
8.3713.478Aero Drive
9.2414.879Balboa 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 north (Express Lanes)Southern end of Express Lanes
12 SR 163 southSouthbound exit and northbound entrance to/from Express Lanes
12.1219.5112 SR 163 south (Cabrillo Freeway) – DowntownSouthbound exit and northbound entrance; former US 395 south
13.3321.4513Miramar WayServes Marine Corps Air Station Miramar
14.2923.0014Miramar Road / Pomerado RoadFormer US 395 north
15.0024.1415Carroll Canyon Road
Hillery Drive – Mira MesaAccess via Express Lanes
15.9225.6216Mira Mesa Boulevard
17.3127.8617Mercy Road / Scripps Poway Parkway
18.1829.2618Poway Road (CR S4) / Rancho Peñasquitos Boulevard
SR 56 west / Ted Williams ParkwayNorthbound exit and southbound entrance via Express Lanes
Sabre Springs-Peñasquitos Transit StationAccess via Express Lanes
19.4731.3319 SR 56 west (Ted Williams Freeway) / Ted Williams ParkwayExit 9 on SR 56
20.5733.1021Carmel Mountain Road
21.9235.2822Camino del Norte
22.9436.9223Bernardo Center Drive
George Cooke Express Drive – Rancho BernardoAccess via Express Lanes
23.6938.1324Rancho Bernardo Road
26.0341.8926Pomerado Road (CR S5) / West Bernardo DriveFormer US 395 south
Escondido26.9743.4027Via Rancho Parkway
Del Lago Boulevard / Beethoven DriveAccess via Express Lanes
27.6544.5028Centre City Parkway (I-15 Bus. north)Northbound exit and southbound entrance; former US 395 north
28.7746.3029Felicita Road / Citracado Parkway
30.0948.43309th Avenue / Auto Park Way
30.6349.2931Valley Parkway (CR S6) – Downtown Escondido
Hale AvenueNorthbound exit and southbound entrance via Express Lanes
I-15 south (Express Lanes)Northern end of Express Lanes
31.5250.7332 SR 78 – Oceanside, RamonaSR 78 exit 17 westbound, 17A-B eastbound
32.8652.8833El 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
40.8465.7341Gopher Canyon Road / Old Castle Road
43.2869.6543Old Highway 395Former US 395
46.4974.8246 SR 76 – Pala, Oceanside
50.5981.4251Mission Road (CR S13) – Fallbrook
54.0787.0254Rainbow Valley Boulevard
RiversideTemecula57.7092.8658 SR 79 south (Temecula Parkway) – Temecula, Warner Springs, IndioSouthern end of SR 79 overlap; former SR 71 south
59.2495.3459Rancho California Road / Old Town Front Street
60.8897.9861 SR 79 north (Winchester Road)Northern end of SR 79 overlap
TemeculaMurrieta line61.6899.2662French Valley ParkwaySouthbound exit only
Murrieta63.00101.3963 I-215 north (Escondido Freeway north) – Riverside, San BernardinoNorthbound exit and southbound entrance; former I-15E north / US 395 north
63.73102.5664 To I-215 north / Murrieta Hot Springs Road – Riverside
64.85104.3765California Oaks Road / Kalmia Street
Wildomar67.90109.2768Clinton Keith Road
69.33111.5869Baxter RoadTo be renamed Wildomar Trail[36]
70.56113.5671Bundy Canyon Road
Lake Elsinore73.42118.1673Diamond Drive / Railroad Canyon Road
74Franklin StreetProposed interchange[37]
75.21121.0475Main Street (I-15 Bus. north)
76.54123.1877 SR 74 (Central Avenue) – San Juan Capistrano, Perris
78.11125.7178Nichols Road
80.95130.2881Lake Street (I-15 Bus. south)
84.66136.2585Indian Truck Trail
87.65141.0688Temescal Canyon RoadFormer SR 71
Corona89.90144.6890Weirick Road / Dos Lagos Drive
91.07146.5691Cajalco Road
92.08148.1992El Cerrito Road
92.95149.5993Ontario AvenueFormer SR 71
94.61152.2695Magnolia Avenue
SR 91 westNorthbound exit and southbound entrance for Express Lanes only
95.76154.1196 SR 91 (Riverside Freeway) – Riverside, Beach CitiesSigned as exits 96A (east) and 96B (west) southbound; former US 91; SR 91 exit 51
CoronaNorco line97.14156.3397Hidden Valley Parkway
Norco97.90157.5598Second Street (I-15 Bus. north)
99.86160.71100Sixth Street (I-15 Bus. south)
EastvaleJurupa Valley line102Schleisman RoadProposed interchange[38]
102.52164.99103Limonite Avenue
104.62168.37105Cantu-Galleano Ranch Road
105.73170.16106 SR 60 (Pomona Freeway) – Los Angeles, RiversideSigned as exits 106A (east) and 106B (west) northbound; SR 60 exit 41 eastbound, 41A westbound
San BernardinoOntario107.55173.08108Jurupa Street / Auto Center DriveFormer SR 31 south
108.93175.31109 I-10 (San Bernardino Freeway) – Los Angeles, San Bernardino, IndioSigned as exits 109A (west) and 109B (east) southbound; former US 99; exits 58A-B on I-10
Rancho Cucamonga109.59176.371104th Street
111.85180.01112 SR 66 (Foothill Boulevard)Former US 66
Rancho CucamongaFontana line113.32182.37113Base Line Road
115 SR 210 (Foothill Freeway) – Pasadena, San Bernardino, RedlandsSigned as exits 115A (east) and 115B (west) northbound (reverse southbound), exit 64A on SR 210; future I-210
Fontana116.16186.94116Summit Avenue
117.91189.76118Duncan Canyon Road
119.38192.12119Sierra Avenue
San Bernardino122.19196.65122Glen Helen Parkway
122.91197.80123 I-215 south (Barstow Freeway south) – San Bernardino, RiversideFormer I-15E south / US 66 west / US 91 south / US 395 south; I-215 exit 54B
124.09199.70124Kenwood AvenueFormer US 66 east
129.14207.83129Cleghorn RoadFormer US 66 west
130.50210.02131 SR 138 – Palmdale, Silverwood Lake
Hesperia137.75221.69138Oak Hill Road
139.53224.55140Ranchero Road
141.45227.64141 US 395 north – Bishop, AdelantoNorthbound exit and southbound entrance; southern end of US 395
To US 395 north / Joshua StreetSouthbound exit and northbound entrance
143.13230.35143Main Street – Hesperia, Phelan
HesperiaVictorville line146.72236.12147Bear Valley Road – Lucerne Valley
Victorville147.96238.12148La Mesa Road / Nisqualli Road
149.64240.82150 SR 18 west (Palmdale Road / I-15 Bus. north)Southern end of SR 18 overlap; former US 66 east / US 91 north
150.56242.30151ARoy Rogers Drive
151.16243.27151BMojave Drive
152.62245.62153A SR 18 east (I-15 Bus. south / CR 66) – Victorville, Apple ValleyNorthern end of SR 18 overlap; former US 66 / US 91
152.75245.83153BE StreetNorthbound exit and entrance
153.53247.08154Stoddard Wells Road
Apple Valley156.64252.09157Stoddard Wells Road – Bell Mountain
160.96259.04161Dale Evans Parkway – Apple Valley
164.82265.25165Wild Wash Road
169.29272.45169Hodge Road
Barstow174.97281.59175Outlet Center Drive
177.90286.30178Lenwood Road
179.46288.81179 SR 58 west – BakersfieldSR 58 exit 234 eastbound to I-15 southbound
180.78290.94181L Street (I-15 Bus. east) / W. Main Street (CR 66)
182.67293.98183 SR 247 south (Barstow Road)
183.55295.40184A I-40 east – NeedlesNorthbound exit and southbound entrance; southbound access is via exit 184; western terminus of I-40
184.08296.25184B To I-40 / E. Main Street (I-15 Bus. / CR 66) – NeedlesSigned as exit 184 southbound; former US 66
186.01299.35186Old Highway 58 westFormer US 91 south/US 466/SR 58 west
188.72303.72189Fort Irwin RoadServes Fort Irwin
190.96307.32191Ghost Town RoadServes the ghost town of Calico
Yermo193.77311.84194Calico Road – Yermo
195.51314.64196Yermo Road – Yermo
Agricultural Inspection Station (closed; was southbound only)
197.62318.04198Minneola Road
205.54330.78206Harvard Road
212.76342.40213Field Road
216.53348.47Clyde V. Kane Rest Area
220.72355.21221Afton Road
229.56369.44230Basin Road
233.37375.57233Rasor Road
Zzyzx239.31385.13239Zzyzx Road – Zzyzx
Baker244.95394.21245Baker Boulevard (I-15 Bus. north) – BakerNorthbound exit and southbound entrance; former US 91 north / US 466 east
245.70395.42246 SR 127 north / Kelbaker Road – Death Valley
247.59398.46248Baker Boulevard (I-15 Bus. south) – BakerSouthbound exit and northbound entrance; former US 91 south / US 466 west
Halloran Springs258.74416.40259Halloran Springs Road
264.70425.99265Halloran Summit Road
270.29434.99Valley Wells Rest Area
Cima271.86437.52272Cima Road
Mountain Pass280.60451.58281Bailey Road
285.59459.61286Nipton Road
Agricultural Inspection Station (southbound only); opened in 2018[25][26]
290.53467.56291Yates Well Road
295.37475.35 I-15 north – Las VegasContinuation into Nevada
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ Mileage is the entire route, including both SR 15 and I-15
  2. ^ The highway was featured on the television program Dangerous Drives (Speed), which illustrated the difficulties of patrolling the highway due to excessive speed and congestion. The 45-minute episode "Dangerous Drives: Highway Patrol" originally aired in January 2010.


  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 of the 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 of the 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 original on June 9, 2008.
  11. ^ "California 15 and Interstate 15 north from Interstate 5 to California 163". California @ Retrieved May 1, 2008.[self-published source]
  12. ^ Thomas Brothers (2000). California Road Atlas and Driver's Guide (Map). Thomas Brothers. pp. V, 99, 106.
  13. ^ "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.
  14. ^ "Interstate 15 Express Lanes". Retrieved March 31, 2012.
  15. ^ "Home". 15 Express Lanes Info.
  16. ^ "Toll lanes could be coming to 15 Freeway through part of San Bernardino County". March 2018.
  17. ^ "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.
  18. ^ "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.
  19. ^ 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 original (PDF) on October 14, 2012. Retrieved November 29, 2011.CS1 maint: ref=harv (link)
  20. ^ a b California Department of Transportation 2009, p. 63
  21. ^ California Department of Transportation 2009, p. 69
  22. ^ California Department of Transportation 2009, p. 67
  23. ^ 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]
  24. ^ Interstate 15 Major Improvements from Barstow to Nevada stateline (PDF) (Map). California Department of Transportation. June 2004. Archived from the original (PDF) on September 11, 2008.
  25. ^ a b "CDFA opens new Border Inspection Station near Nevada border". California Department of Food and Agriculture. August 24, 2018. Retrieved November 23, 2018.
  26. ^ a b "Caltrans opens new Agricultural Inspection Station I-15, dismantling old station in Yermo". Daily Press. September 7, 2018. Retrieved October 9, 2018.
  27. ^ Faigin, Daniel P. (July 18, 2012). "Routes 193 through 200". California Highways. Self-published. Retrieved July 18, 2012.[self-published source]
  28. ^ H.M. Gousha. 1955 Gousha Los Angeles district map (Map). H.M. Gousha. Archived from the original on July 26, 2011. Retrieved November 29, 2011.
  29. ^ 1963 Caltrans Los Angeles and vicinity map (Map). Retrieved November 29, 2011.
  30. ^ 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]
  31. ^ Faigin, Daniel P. (July 18, 2012). "Routes 25 through 32". California Highways. Retrieved July 18, 2012.[self-published source]
  32. ^ 1986 Caltrans Los Angeles and vicinity map (Map). Retrieved November 29, 2011.
  33. ^ Lilly, Caitlin (June 30, 2020). "XpressWest receives permission to use I-15 right-of-way in California". Retrieved July 2, 2020.
  34. ^ Sharp, Steven (July 7, 2020). "High-Speed Train to Las Vegas Takes Another Step Forward". Urbanize LA. Retrieved July 7, 2020.
  35. ^ a b Warring, KS (January 14, 2007). "Interstate 15 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. Retrieved February 5, 2009.
  36. ^ "Say Goodbye to Baxter Road in Wildomar: I-15 Exit Getting Renamed". Lake Elsinore-Wildomar Patch. Patch Media. Retrieved March 8, 2020.
  37. ^ "City of Lake Elsinore : I-15/Railroad Canyon Road & Franklin Interchange Project".
  38. ^ Bender, Mary (July 20, 2005). "Country Road to Get New Course: Schleisman, Plans Are Under Way to Widen the Artery in the High-Growth Area, and Link it to I-15". City of Riverside. Retrieved July 18, 2012.

External links[edit]

Route map:

KML is from Wikidata

Interstate 15
Previous state:
California Next state: