I-8: Mission Valley Freeway / Kumeyaay Highway

I-8
Mission Valley Freeway / Kumeyaay Highway
Runs from Sunset Cliffs Blvd in San Diego to Winterhaven, CA and to Casa Grande, AZ (I-10)

This freeway serves as the sole freeway connection east for the San Diego area. Running from near the beaches, over a mountain range, and through the Imperial Desert, it is indeed a route with varied terrain. As a result of these differences, I-8 holds a couple of records for Interstates. It has the tallest bridge on the Interstate system, at 440′ above the canyon floor. It also has the lowest point on the Interstate system, at about -72 feet at the crossing of the New River near Seeley.

Taylor St at US 80 (Now I-8) in 1960, looking east
Original 1950's guard rail in Mission Valley near Taylor Road.
Original 1950’s guard rail in Mission Valley near Taylor St.
I-8 just east of East Willows Road showing an arrow in the middle lane. This was painted during freeway construction in 1972.
I-8 just east of East Willows Road showing an arrow in the middle lane. This was painted during freeway construction in 1972.
Beneath the Pine Valley Bridge
Beneath the Pine Valley Bridge
Descending Mountain Springs Grade along the San Diego/Imperial County line.
Descending Mountain Springs Grade along the San Diego/Imperial County line.
I-8 from Japutal Valley Road toward Boulevard.
I-8 from Japutal Valley Road east toward Boulevard.

The route, in California, follows former US 80 and was completed about 1975.

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