Interstate 15 in California

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Interstate 15
Main route of the Interstate Highway System
Defined by S&HC § 315, maintained by Caltrans
Length: 287.26 mi[1] (462.30 km)
Formed: 1957
South end: I-8 / SR 15 in San Diego
Major
junctions:		 SR 78 in Escondido
I-10 in Ontario
SR 18 in Victorville
I-40 in Barstow
North end: I-15 towards Las Vegas, NV
State highways in California (list - pre-1964)
County routes in California (list)
< SR 14 SR 15 >
History - Unconstructed - Deleted - Freeway - Scenic

In the U.S. state of California, Interstate 15 is a major north-south route through the San Bernardino, Riverside, and San Diego counties and has a length of 287.26 miles (462 km) in the state. It is a major thoroughfare for traffic between Southern California and Las Vegas. It is also the main route for traffic between San Diego and the Inland Empire.

This route is part of the California Freeway and Expressway System[2] and is eligible for the State Scenic Highway System[3].

Contents

[edit] Route description

 This section may require cleanup to meet Wikipedia's quality standards.
Please improve this article if you can (January 2008).
Major cities
Bolded cities are officially-designated control cities for signs[4]

I-15's southern terminus is I-8 in San Diego. From I-8, it runs north through Escondido in San Diego County, passing MCAS Miramar. The highway passes through hilly terrain and avocado farmland before entering Riverside County near the rapidly-growing community of Temecula. In Murieta, I-15 splits from its first (and only) spur route in California, I-215, which runs through the two largest cities in the Inland Empire: San Bernardino and Riverside. I-15 runs along the eastern edge of the Santa Ana Mountains, passing the community of Lake Elsinore. The freeway continues through the suburban areas in the western Inland Empire, passing Corona and Ontario. The highway then heads northward and upward through Cajon Pass, a historic pass for travelers heading to Los Angeles from the north and east. North of the pass, I-15 traverses the Mojave Desert cities of Hesperia and Victorville. The freeway passes through mostly unspoiled desert for 30 miles (48 km) before reaching Barstow, the last city I-15 passes through in California. The only other settlement I-15 passes through in its final 108 miles (174 km) is Baker, known as the "Gateway to Death Valley" and is home to the world's largest thermometer. The sign for the Zzyzx exit, the alphabetically last place name in the United States, is a well-known landmark along the drive from Los Angeles to Las Vegas on I-15.[citation needed] I-15 leaves California near the gambling town Primm, Nevada (formerly Stateline, Nevada).

[edit] Escondido Freeway

Heading northward, I-15 begins at Interstate 8 at the same place that its continuation, State Route 15, begins its southward journey. I-15 goes through Mission Valley and intersects with State Route 52 and merges with State Route 163. After traversing the MCAS Miramar base, I-15 emerges into Carmel Valley, where it intersects with the end of State Route 56. I-15 continues north into Escondido, where it interchanges with State Route 78. North of Escondido, I-15 goes through rural areas, intersecting State Route 76 before it crosses the county line into Riverside County. In Riverside County, SR 79 runs concurrently with I-15 for a brief portion before it heads north to Hemet. Then, I-15 intersects with the southern end of Interstate 215, which carries the designation of the Escondido Freeway. Interstate 15 continues north as the Temecula Valley Freeway.[5]

On January 24, 1957, the State Highway Commission defined the Escondido Freeway as what is now Routes 15 and 215 from Route 805 to Route 91. Note that this entire segment was previously 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.[6] 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.[7]

I-15 between SR 163 and Miramar Road is known as the Semper Fi Highway in recognition of the nearby MCAS Miramar.[8]

There are high-occupancy toll lanes in the center of I-15 from State Route 163 to State Route 56.[9]

[edit] Temecula Valley Freeway

The Temecula Valley Freeway is a segment of Interstate 15 in Riverside County, California, United States, traveling southeast to northwest through the southern portions of the Inland Empire region. It begins at the Riverside/San Diego county line, where the Corona Freeway ends; travels north through the cities of Murrieta (where the Escondido Freeway designation switches to Interstate 215) and Temecula; and ends at Bundy Canyon Road near Lake Elsinore. Thereafter, I-15 is designated as the Corona Freeway.

[edit] Corona Freeway

The Corona Freeway is a freeway traveling through Riverside County, California. It is signed as Interstate 15 along its entire length. The Corona Freeway runs north-south from its southern terminus at I-215 near Temecula to its northern terminus at the Riverside Freeway (State Route 91).

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".[10]

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.[11]

Then in 1993, the California Assembly passed legislation officially designating State Route 71 as a part of the Chino Valley Freeway.[12] However, the name "Corona Freeway" is, confusingly, sometimes still applied to this portion of SR 71; despite the 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".

[edit] Ontario Freeway

The Ontario Freeway is a segment of Interstate 15 in southern California, running through San Bernardino and Riverside counties. It is the principal north-south freeway through the fast-growing Inland Empire region, in the far eastern suburbs of Los Angeles.

North of Limonite Avenue (south of SR 60), I-15 is known as the Ontario Freeway. I-15 intersects State Route 60, Interstate 10, and State Route 210 in rapid succession as it goes through Norco and Rancho Cucamonga. As it nears Devore, I-15 merges with Interstate 215 and becomes what is known as the Barstow Freeway or the Mojave Freeway.

[edit] Mojave Freeway

The Mojave Freeway is the name given to the segment of Interstate 15 in California between the northern I-215 junction and the Nevada state line. The portion between former State Route 30 and the Nevada state line is also known as the Barstow Freeway. It is the principal route between Los Angeles and Las Vegas.

The Ontario (I-15) and Escondido (I-215) freeways meet in Devore, a foothill town just northwest of San Bernardino, merging into the Mojave Freeway. Crossing the San Bernardino Mountains at the Cajon Pass, the freeway enters the Victor Valley and continues northeast through the Mojave Desert. It terminates at the Nevada state line; I-15 continues thereafter to Las Vegas, Salt Lake City, and the cities of western Montana before ending at the U.S.-Canada border.

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

[edit] History

 Please help improve this section by expanding it.
Further information might be found on the talk page or at requests for expansion.

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

I-15 was initially planned to run from I-10 in 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 within the state. California successfully argued the addition south to San Diego, suggesting that the freeway would connect the major military bases former March AFB and former NAS Miramar. US 395 was then signed TEMP-15 and the "old" I-15 between Devore and San Bernardino became I-215.

[edit] Future

Most of Interstate 15 is undergoing major improvements from Devore to the Nevada State Line, beginning in 2002 and costing $349 million. This project will improve traffic flow on the heavily traveled highway for those going to and from Las Vegas. Most of the construction will be completed by Winter 2009. [1] Projects include adding truck lanes on hills (39 miles at various locations), repaving 76 miles 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.

[edit] Exit list

Note: Except where prefixed with a letter, postmiles were measured in 1964, based on the alignment as it existed at that time, and do not necessarily reflect current mileage. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.
County Location Postmile
[13][14][15]		 #[16] Destinations Notes
San Diego
SD R6.13-R54.26		 San Diego R6.13 SR 15 south Continuation beyond I-8
6B Camino del Rio South
R6.13 6B I-8 – El Centro, Beaches
R6.82 7 Friars Road - Qualcomm Stadium Signed as exits 7A (east) and 7B (west) northbound
R8.37 8 Aero Drive
R9.24 9 Balboa Avenue, Tierrasanta Boulevard Former SR 274
R10.00 10 Clairemont Mesa Boulevard Southbound exit is part of exit 11
R10.58 11 SR 52
M12.12 12 SR 163 south (Cabrillo Freeway) Southbound exit and northbound entrance
M13.33 13 Miramar Way Serves MCAS Miramar
M14.29 14 Miramar Road, Pomerado Road
M15.00 15 Carroll Canyon Road
M15.92 16 Mira Mesa Boulevard
M17.31 17 Mercy Road, Scripps Poway Parkway
M18.18 18 Poway Road (CR S4), Rancho Peñasquitos Boulevard
M19.47 19 SR 56 west / Ted Williams Parkway
San Diego M20.57 21 Carmel Mountain Road
M21.92 22 Camino del Norte
M22.94 23 Bernardo Center Drive
M23.69 24 Rancho Bernardo Road
M26.03 26 Pomerado Road (CR S5), West Bernardo Drive
Escondido M26.97 27 Via Rancho Parkway
M27.65 28 Centre City Parkway (Bus. 15 north) Northbound exit and southbound entrance; former US 395
R28.77 29 Felicita Road
Escondido R30.09 30 9th Avenue, Auto Park Way
R30.63 31 Valley Parkway – Downtown Escondido
R31.52 32 SR 78 – Oceanside, Ramona
R32.86 33 El Norte Parkway
R33.92 34 Centre City Parkway (Bus. 15 south) Southbound exit and northbound entrance; former US 395
R36.64 37 Deer Springs Road (CR S12), Mountain Meadow Road
R40.84 41 Gopher Canyon Road, Old Castle Road
R43.28 43 Old Highway 395 Former US 395
R46.49 46 SR 76 – Pala, Oceanside
R50.59 51 Mission Road (CR S13) - Fallbrook
R54.07 54 Rainbow Valley Boulevard
Riverside
RIV R0.00-52.28		 Temecula 3.44 58 SR 79 south – Temecula, Indio South end of SR 79 overlap
4.98 59 Rancho California Road, Old Town Front Street
6.62 61 SR 79 north (Winchester Road) North end of SR 79 overlap
Murrieta 8.74 63 I-215 north (Escondido Freeway) – Riverside, San Bernardino Northbound exit and southbound entrance
9.47 64 Murrieta Hot Springs Road
10.59 65 California Oaks Road
13.64 68 Clinton Keith Road
15.07 69 Baxter Road
16.30 71 Bundy Canyon Road
Lake Elsinore 19.16 73 Diamond Drive, Railroad Canyon Road
20.95 75 Main Street (Bus. 15 north)
22.28 77 SR 74 (Central Avenue)
23.85 78 Nichols Road
26.69 81 Lake Street (Bus. 15 south)
30.40 85 Indian Truck Trail
33.39 88 Temescal Canyon Road
35.64 90 Weirick Road
36.81 91 Cajalco Road
37.82 92 El Cerrito Road
Corona 38.69 93 Ontario Avenue
40.35 95 Magnolia Avenue
41.50 96 SR 91 (Riverside Freeway) – Riverside, Beach Cities Signed as exits 96A (east) and 96B (west) southbound
Norco 42.88 97 Hidden Valley Parkway
43.64 98 Second Street (Bus. 15 north)
45.60 100 Sixth Street (Bus. 15 south)
48.26 103 Limonite Avenue
105 Cantu-Galleano Ranch Road
51.47 106 SR 60 (Pomona Freeway) – Los Angeles, Riverside Signed as exits 106A (east) and 106B (west) northbound
San Bernardino
SBD 0.00-186.24		 Ontario 1.02 108 Jurupa Street
2.39 109 I-10 (San Bernardino Freeway) – Los Angeles, San Bernardino, Indio Split into exits 109A (west) and 109B (east) southbound
Rancho Cucamonga 3.05 110 4th Street
5.31 112 SR 66 (Foothill Boulevard)
6.78 113 Baseline Road
8.35 115 SR 210 (Foothill Freeway) – Pasadena, San Bernardino Signed as exits 115A (east) and 115B (west) northbound, and the opposite southbound
9.61 116 Summit Avenue
Fontana 12.84 119 Sierra Avenue
15.65 122 Glen Helen Parkway
16.37
R13.78		 123 I-215 south (Barstow Freeway) – San Bernardino, Riverside Left exit southbound
R14.96 124 Kenwood Avenue Former US 66
R20.01 129 Cleghorn Road Former US 66
R21.37 131 SR 138 – Palmdale, Silverwood Lake
R28.62 138 Oak Hill Road
31.81 141 US 395 north – Adelanto, Bishop Northbound exit and southbound entrance
32.32 141 To US 395 north / Joshua Street Southbound exit and northbound entrance
Hesperia 34.00 143 Hesperia, Phelan
Victorville 37.59 147 Bear Valley Road – Lucerne Valley
40.51 150 SR 18 west (Palmdale Road, Bus. 15 north) South end of SR 18 overlap
41.43 151A Roy Rogers Drive
42.03 151B Mojave Drive
43.49 153A SR 18 east (D Street, Bus. 15 south) – Victorville, Apple Valley North end of SR 18 overlap; former US 66
43.62 153B E Street
44.40 154 Stoddard Wells Road
47.39 157 Stoddard Wells Road - Bell Mountain
51.83 161 Dale Evans Parkway – Apple Valley
55.96 165 Wild Wash Road
60.16 169 Hodge Road
65.84 175 Outlet Center Drive
Barstow 68.77 178 Lenwood Road
70.10 179 SR 58 west – Bakersfield
71.62 181 L Street, West Main Street (Bus. 15 north)
73.54 183 SR 247 (Barstow Road)
74.42 184A I-40 east – Needles Southbound exit is via exit 184
74.95 184B East Main Street (Bus. 15 south) Signed as exit 184 southbound; former US 66
76.88 186 Old Highway 58 Former SR 58 west
79.59 189 Fort Irwin Road Serves Fort Irwin
R81.84 191 Ghost Town Road Serves the ghost town of Calico
R84.64 194 Calico Road – Yermo
R86.38 196 Yermo Road – Yermo
R88.49 198 Minneola Road
R96.41 206 Harvard Road
R103.63 213 Field Road
R111.59 221 Afton Road
R120.42 230 Basin Road
R124.23 233 Rasor Road
R130.18 239 Zzyzx Road
R135.80 245 Baker Northbound exit and southbound entrance
R136.57 246 SR 127 north / Kelbaker Road – Death Valley
R138.45 248 Baker Southbound exit and northbound entrance
149.60 259 Halloran Springs Road
155.57 264 Halloran Summit Road
162.73 272 Cima Road
171.47 281 Bailey Road
176.45 286 Nipton Road Connects to SR 164 in Nevada
181.39 291 Yates Well Road

[edit] References

  1. ^ Route Log- Main Routes of the Eisenhower National System of Interstate and Defense Highways - Table 1
  2. ^ CA Codes (shc:250-257)
  3. ^ CA Codes (shc:260-284)
  4. ^ List of Control Cities for Use in Guide Signs on Interstate Highways
  5. ^ Thomas Brothers. California Road Atlas and Driver's Guide [map]. (2000) Page V, 99, 106.
  6. ^ 2006 Named Freeways, Highways, Structures and Other Appurtenances in California. Caltrans, 60. Retrieved on 2007-03-28. 
  7. ^ Ib. at 63
  8. ^ California Highways, Routes 9 through 16. CaHighways.org (2007-08-30). Retrieved on 2007-08-30.
  9. ^ Interstate 15 Express Lanes
  10. ^ 2006 Named Freeways, Highways, Structures and Other Appurtenances in California. Caltrans, 69. Retrieved on 2007-03-28. 
  11. ^ Ib. at 63
  12. ^ Ib. at 67
  13. ^ California Department of Transportation, State Truck Route List (XLS file), accessed February 2008
  14. ^ California Department of Transportation, Log of Bridges on State Highways, July 2007
  15. ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
  16. ^ California Department of Transportation, California Numbered Exit Uniform System, I-15 Northbound and I-15 Southbound, accessed February 2008
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Freeways in Greater Los Angeles
Radial
Circumferential
Inland Empire
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Interstate 15
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Terminus		 California Next state:
Nevada
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