The exact site of the smash up is on the westbound side of Interstate 210 in La Crescenta, California, approximately one mile before the Sunland Boulevard exit. The freeway was under construction during filming in 1976, and was not open from Lowell Avenue to Sunland Boulevard. Corvette Summer (1978) used this same section of Interstate 210 in that film's finale.
Interstate 5 runs north and south on the west coast of the United States paralleling U.S. Highway 101 from the Mexican to the Canadian borders connecting the cites of San Diego, Los Angeles, Sacramento (California), Medford, Eugene, Salem, Portland (Oregon), Tacoma, Seattle, Everett, and Bellingham (Washington).
Buddy Ebsen (Al Pearson) is Bonnie Ebsen's (Penny) father.