Arroyo Seco Speedway and Riverside Drive, bridges and intersection, Los Angeles County, Calif., 1946

6 photographs, including a freeway, bridges, and ramps with automobiles, houses, trees and vegetation in the surroundings, Los Angeles County, California, 1946 April 7. The Arroyo Seco Parkway, also known as the Pasadena Freeway and California Highway 110, was the first freeway built in the USA.