Where is Interstate 8 Located

Where is Interstate 8

States Of Arizona, California
Cities in Arizona: Casa Grande, Yuma
in California: San Diego
Brief description Interstate 8 runs along the Mexican border from the Phoenix metropolitan area to the Pacific near San Diego. The route bypasses the compaction areas of Phoenix and Los Angeles, but passes through a rather rough desert landscape.
Length 350 Miles
No duty to pay fees

Where does Interstate 8 start and end?
When was the Interstate 8 built?
How far does the I 10 go?
How long did it take to build the 5 freeway?