1988, US 521 was moved west onto new highway west of Dalzell, bypassing the town; the old alignment was downgraded to secondary roads. In 1996, US 521 was rerouted onto I-485, between exits 61 and 65; the old alignment was downgraded to secondary roads. In 2003, the American Association of State Highway and Transportation Officials (AASHTO) approved US 521 to be truncated at its current northern terminus at the Johnston Road/I-485 interchange; its old alignment north to I-85 was downgraded to secondary roads. Future There are plans to make US 521 a four-lane highway from Georgetown to I-95, in Manning. This would improve a route for beach goers traveling toward the Litchfield/Pawleys area. Junction list Special routes See also References External links Endpoints of US 521 21-5 21-5 21-5 Transportation in Georgetown County, South Carolina Transportation in Williamsburg County, South Carolina Transportation in Clarendon County, South Carolina Transportation in Sumter County, South Carolina Transportation in Kershaw County, South Carolina Transportation in Lancaster County, South Carolina Transportation in Mecklenburg County, North Carolina Transportation in Charlotte, North Carolina 5