Claim: The roadway, dedicated as the County Causeway and has a total length of 3.5 miles (5.6 km), 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: 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. 3.5 miles (5.6 km)