Interstate 8

Interstate 8

I-8 is the main Interstate highway serving the San Diego metropolitan area from west to east. It begins at the foot of the San Diego River at Sunset Cliffs Boulevard, and it leads east across the Imperial Desert into Arizona. For most of its route, Interstate 8 replaced U.S. 80, which used to extend all the way to San Diego, but was eventually truncated in stages to Mesquite, Texas.

Interstate 8 California Guides

San Diego County

The following is a synopsis of the history of Interstate 8 in the San Diego metropolitan area:

Many thanks to Merle F. McClelland for his assistance in creating this historical chronology.

Statewide Opening Dates of Interstate 8

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Page Updated Sunday May 10, 2009.