Anyone sitting in the traffic at Rosecrans Street and Sports Arena Boulevard today might want to have a word with traffic engineers from 1940s and 1960s. Touted as “modernization of the highway system in San Diego” was the 1941 construction of a new interchange between then-U.S. 101 and Mission Valley Road, today’s Interstate 8.

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Explore San Diego County's backroads, beaches, mountains and deserts with Joyride Guru® and award-winning author Jack Brandais. Make them your San Diego day trip.