Claim: The roadway, dedicated as the County Causeway, was completed in 1920, and the State Road Board and Dade County Commission voted to rename the causeway in honor of World War II General Douglas MacArthur in 1942.
Evidence: In the late 1910s, with the deteriorating wooden Collins Bridge (now, the Venetian Causeway) as the only direct land route between mainland Miami and the barrier islands of Miami Beach, construction on the roadway began in 1917. The roadway, dedicated as the County Causeway, was completed in 1920. Having undergone several lane and structural expansions following opening of the original two-lane road, the State Road Board and Dade County Commission voted to rename the causeway in honor of World War II General Douglas MacArthur in 1942. The General Douglas MacArthur Causeway is a six-lane causeway which connects downtown Miami, Florida to South Beach, Miami Beach via Biscayne Bay.