Interstate 395 ends at Fountain Street, the entrance to Palm Island Park which has a traffic light as well as bus stops.

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.

Watson Island was reclaimed surrounding the western end of the roadway, completed in 1926.

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.

[2] The causeway was accessible from mainland Miami via Biscayne Boulevard and intersecting side streets through the 1960s.