#123 Downtown Traffic, early 1950s

Mt. Diablo at Main -- Early 1950s

After the opening of Broadway Shopping Center in 1951, traffic on Main Street and Mt. Diablo Boulevard was gridlocked every afternoon. Mt. Diablo also served as Highway 24; Main Street served as both Highway 24 and 21. City officials used photos to “plead their case” for the State to build a freeway bypass to ease congestion. Traffic relief came in 1960, when the new freeway opened.