Interstate 8
From Wikipedia, the free encyclopedia
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| Interstate 8 Main route of the Interstate Highway System |
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| Length: | 348.25 mi (560.45 km) |
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| Formed: | 1964 |
| West end: | Sunset Cliffs Blvd. in San Diego, CA |
| Major junctions: |
 I-5 in San Diego, CA I-15 in San Diego, CA US 95 in Yuma, AZ |
| East end: |  I-10 near Casa Grande, AZ |
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Interstate 8 (abbreviated I-8) is an Interstate highway in the southwestern United States. It runs from the southern edge of Mission Bay at Sunset Cliffs Blvd. in San Diego, California (map), almost at the Pacific Ocean, to the junction with Interstate 10, just southeast of Casa Grande, Arizona (map). In California, especially from eastern San Diego County to points east, Interstate 8 runs very close to the United States-Mexico border. At points in eastern Imperial County, the border is no more than two miles (3 km) south of the Interstate.
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[edit] Route description
[edit] California
[edit] State law
Legal Definition of Route 8: California Streets and Highways Code, Chapter 2, Article 3, Section 308
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Route 8 is part of the Scenic Highway System, as stated by section 263.1 of the California State Highway Code. |
[edit] Length
| Miles | km | state | |
| 172 | 277 | California | |
| 178.33 | 287 | Arizona | |
| 350.33 | 564 | Total | |
[edit] Major cities
Bolded cities are officially-designated control cities for signs.
- San Diego, California
- El Centro, California
- Yuma, Arizona
- Phoenix, Arizona (via Arizona State Route 85)
- Tucson, Arizona (via Interstate 10)
[edit] Intersections with other interstates
- Interstate 5 in San Diego, California (Map)
- Interstate 805 in San Diego, California
- Interstate 15 in San Diego, California
- Interstate 10 in Casa Grande, Arizona
Where it meets the I-5 the San Diego fwy by Mission Bay the Ocean Beach fwy I-8 becomes the Mission Valley fwy I-8 .
[edit] Control Cities
Eastbound
- El Centro - between San Diego and El Centro
- Yuma - between El Centro and Yuma
- Phoenix and Tucson - between Yuma and AZ-85 in Gila Bend
- Tucson - between AZ-85 in Gila Bend and I-10
Westbound
- San Diego - entire route
[edit] Notes
- East of Yuma, the eastbound and westbound lanes invert; that is, the carriageways run on the left side of the median for roughly three miles.
- Throughout the entire length of Interstate 8, it only intersects one U.S. highway (US 95 in Yuma).
- Much of I-8 in the Imperial Valley in California runs below sea level; in fact, at the New River near Seeley, CA, I-8 reaches the lowest land elevation in the entire Interstate system at -52 ft. (-16 m).
- I-8 within the Mountain Springs/In Ko Pah grade has one of the widest medians on the entire Interstate highway system. In places, the median is over 1.5 miles wide.
[edit] References and external links
[edit] Entire highway
- Interstate 8 at Larry's Phat Page
[edit] Arizona
[edit] California
- Western Exit Guide - Interstate 8 California
- January 1, 2006 California Log of Bridges on State Highways
- Cal-NExUS Interchange Exit Numbering
| Main Interstate Highways (multiples of 5 in pink) |  |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4 | 5 | 8 | 10 | 12 | 15 | 16 | 17 | 19 | 20 | 22 | 24 | 25 | 26 | 27 | 29 | 30 |
| 35 | 37 | 39 | 40 | 43 | 44 | 45 | 49 | 55 | 57 | 59 | 64 | 65 | 66 | 66 (W) | 68 | |
| 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 (W) | 76 (E) | 77 | 78 | 79 | 80 | 81 | 82 | ||
| 83 | 84 (W) | 84 (E) | 85 | 86 (W) | 86 (E) | 87 | 88 (W) | 88 (E) | 89 | 90 | ||||||
| 91 | 93 | 94 | 95 | 96 | 97 | 99 | (238) | H-1 | H-2 | H-3 | ||||||
| Unsigned | A-1 | A-2 | A-3 | A-4 | PRI-1 | PRI-2 | PRI-3 | |||||||||
| Lists | Main - Auxiliary - Suffixed - Business - Proposed - Unsigned Gaps - Intrastate - Interstate standards - Replaced |
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| Browse numbered routes | ||||
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<  SR 7 |
CA | SR 9  > |
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<  SR 789 |
AZ | I-10 > |
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