Arroyo Seco traffic jam, 1952.
Caption slip reads: "Photographer: Rustan. Date: 1952-01-18. Reporter: Cowles. Assignment: Arroyo Seco traffic jam. Cars in traffic jam on Arroyo Seco freeway during dinner hour. Cars on outbound lanes run bumper to bumper. Scene shows cars from College Avenue overhead with cars backed up onto Figueroa Street".