SC 401 out to the beaches 1932 Official

SC 703 replaces SC 401 1933 Official

Adjustments: By 1940, SC 703 was extended past the center point of the Isle of Palms to its current endpoint at 41st St.
In 1945, SC 703 was rerouted to have a new crossing onto Sullivans Island via the Ben Sawyer Bridge. Its Mt. Pleasant end moved to the current SC 703 junction with I-526 Bus. The previous Mt. Pleasant route was Pitt St/Church St, Hibben St, and Whilden St. On Sullivans Island SC 703 used Osceola Ave and Middle St.

SC 703 using the Pitt St bridge 1940 Charleston County

SC 703 moved to Ben Sawyer Blvd 1952 Charleston County

Between 1953-57, SC 703 was given its current routing from the Breach Inlet Bridge to SC 517. The old route used S-10-7 Carolina Ave/4th St/Ocean Blvd/JC Long Blvd.

SC 703 along the Isle of Palms waterfront 1952 Charleston County

SC 703 removed from the Isle of Palms waterfront 1957 Charleston County

In 1992, SC 703 north was extended to US 17 at the east end of the Cooper River Bridge, replacing the southern half of US 17 Business in Mt. Pleasant.

US 17 Business through Mt. Pleasant 1967 Charleston County

SC 703 extended out to Mt. Pleasant Bypass 1996 Charleston County

Improvements: Fully paved at creation
SC 703 was multilaned from Coleman Blvd. south to the causeway by 1975; Multilane along its Coleman Blvd. section, as well.
Comment: SC 703's Ben Sawyer Bridge is the drawbridge that was toppled onto its head by Hurricane Hugo in 1989, but was placed back on its deck and is still in use today.