South Carolina Highway 903
South Carolina Highway 903 (SC 903) is a primary state highway in the U.S. state of South Carolina. It connects Lancaster to Darlington, Florence, and the Grand Strand. Route description. SC 903 is a two-lane rural highway, from Catarrh to Lancaster. Control cities listed southbound include Myrtle Beach. History. Established either in 1929 or 1930 as a new primary routing, it traversed from SC 35 in Catarrh to SC 9 in Midway. In 1949, SC 903 was extended north to its current northern terminus in Lancaster, replacing an old alignment of SC 9. South Carolina