I-8 | |||
Get started | San Diego | ||
End | Winterhaven | ||
Length | 172 mi | ||
Length | 277 km | ||
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Interstate 8 or I -8 is an Interstate Highway in the US state of California. The highway is the southernmost east-west route in the state, running parallel and close to the Mexican border. At Seeley a height of 16 meters below sea level is reached. The highway runs through the sandy desert to Winterhaven, near the Arizona border. The route in California is 277 kilometers long.
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Travel directions
I-8 at San Diego.
I-8 at Descanso.
I-8 through the In-Ko-Pah Gorge east of San Diego. The lanes are more than 2 kilometers apart here.
I-8 in far eastern California.
The highway begins in San Diego, near the Sea World tourist attraction. Shortly after this you cross the Interstate 5, after which the highway has 2×4 lanes. San Diego has a special topography, due to the presence of small canyons and ravines in the city, some streets can be 100 meters higher than the adjacent streets. I-8 runs along such a precipice, with the adjacent residential area 70 meters higher as the crow flies just 100 meters. A little further one crosses the SR-163, the Cabrillo Freeway, which comes from the center. Traffic can also drive towards Las Vegas with this. The highway again runs along the canyons, crossing Interstate 805, which forms an eastern bypass. One passes by the Qualcomm Stadium, with a square kilometer parking lot surrounding it. Immediately after this one crosses Interstate 15, which runs from San Diego to Las Vegas and beyond. The highway then ascends to the eastern suburbs, entering the suburb of La Mesa. Here one crosses the SR-125, the South Bay Expressway, also the easternmost bypass of the conurbation. In this area there are many expensive houses on hills. After this you arrive in El Cajon, where you can take the SR-67, the San Vicente Freeway. Although people are now more or less leaving the agglomeration, the hills are still dotted with houses.
After 50 kilometers you leave the urban area for good, which is exchanged for the Cleveland National Forest. However, there are not many forests here, it mainly consists of steep hills with shrubs. One can see wind turbines, like so many places in southern California. The landscape becomes more and more a desert, and at one point the median strip is more than 2 kilometers wide. Here the Mexican border is only 2 kilometers away. After about 40 kilometers the desert ends abruptly, giving way to irrigated farmland of water from the nearby Salton Sea. This basin is located below sea level. The regional town of El Centro is also located in this area. To the south is Calexico, situated opposite Mexicali. The entire irrigated area is about 45 kilometers wide, and the I-8 runs almost straight through this. After this, the landscape abruptly changes into a desert again. One now enters the Sand Hills, a dune area in the desert, where many quads can be raced. This area is also known as the Imperial Sand Dunes. The highway runs less than 500 meters from the Mexican border in some spots. Just before Yuma, one crosses the Colorado River, passing Winterhaven, where theInterstate 8 in Arizona continues.
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History
I-8 was originally intended as US 80, a US Highway, from 1929 to 1964. The highway was signposted Interstate 8 from 1964. The first section of the highway opened in 1958 east of I-15. By 1961, the section through San Diego was largely completed, except for the westernmost section which opened in 1969. By 1970, the highway through what are now the eastern suburbs was completed. The section through the flat irrigated agricultural fields south of the Salton Sea was completed in 1967 and 1971. The highway to the Arizona border was completed in 1973. The last section to open was the mountainous section through the Cleveland National Forest, which opened in 1975.
Opening history
From | Unpleasant | Length | Date |
Exit 7 | exit 8 | 2 km | 00-00-1958 |
Exit 2B | Exit 4 | 3 km | 00-00-1959 |
Exit 4 | Exit 7 | 5 km | 00-00-1960 |
exit 8 | Exit 10 | 3 km | 00-00-1960 |
Exit 10 | exit 13A | 5 km | 00-00-1961 |
Exit 13B | Exit 20A | 12 km | 00-00-1961 |
exit 13A | Exit 13B | 1 km | 00-00-1962 |
exit 80 | Exit 87 | 12 km | 04-05-1965 |
Exit 20A | Exit 22 | 3 km | 28-07-1965 |
Exit 22 | Exit 27 | 8 km | 20-06-1966 |
Exit 107 | Exit 114 | 12 km | 09-06-1967 |
Exit 114 | Exit 118 | 6 km | 31-07-1967 |
exit 61 | exit 80 | 31 km | 08-08-1967 |
Exit 87 | Exit 107 | 32 km | 05-12-1968 |
Exit 27 | exit 33 | 10 km | 22-05-1969 |
Exit 125 | Exit 131 | 10 km | 05-06-1969 |
Exit 1 | Exit 2B | 2 km | 21-07-1969 |
exit 0 | Exit 1 | 1 km | 01-12-1969 |
Exit 131 | Exit 166 | 56 km | 17-08-1970 |
exit 33 | Exit 40 | 12 km | 07-10-1970 |
Exit 118 | Exit 125 | 12 km | 01-07-1971 |
Exit 166 | Exit 172 | 10 km | 18-05-1973 |
Exit 54 | exit 61 | 12 km | 23-01-1974 |
Exit 40 | exit 47 | 12 km | 25-11-1974 |
exit 47 | Exit 54 | 13 km | 07-07-1975 |
Traffic intensities
Exit | Location | 2007 | 2016 |
Exit 1 | San Diego | 44,000 | 48,000 |
Exit 2 | San Diego ( I-5 ) | 140,000 | 134,000 |
Exit 4 | San Diego ( SR-163 ) | 212,000 | 237,000 |
exit 6 | San Diego ( I-805 ) | 230,000 | 246,000 |
Exit 7 | San Diego ( I-15 ) | 248,000 | 247,000 |
Exit 14 | LaMesa ( SR-125 ) | 188,000 | 183,000 |
Exit 15 | El Cajon | 252,000 | 247,000 |
Exit 17 | El Cajon ( SR-67 ) | 183,000 | 148,000 |
Exit 19 | El Cajon | 121,000 | 116,000 |
Exit 40 | descanso | 26,000 | 22,000 |
Exit 89 | ocotillo | 13,000 | 13,000 |
Exit 116 | El Centro | 37,000 | 34,000 |
Exit 172 | border with Arizona | 17,000 | 18,000 |
Lane Configuration
I-8 through the In-Ko-Pah Grade.
From | Unpleasant | Lanes |
exit 0 | Exit 1 | 2×2 |
Exit 1 | Exit 2 (I-5) | 2×3 |
Exit 2 (I-5) | Exit 14 | 2×4 |
Exit 14 | Exit 15 | 2×5 |
Exit 15 | Exit 17 | 2×4 |
Exit 17 | Exit 20 | 2×3 |
Exit 20 | Exit 170 | 2×2 |