From I-20 East to Columbia:

Take I-520 WB to US 1/78 (Jefferson Davis Highway) to SC 118 (Robert M Bell Highway) to US 1 (Columbia Highway) to I-20 EB

From I-20 W to Augusta Highway:

Take SC 19 (Edgefield Highway) to US 25 (Edgefield Road) in Trenton to I-20 WB

Local citizens may take their preferred route. Refer to the map above to see the signed detour route.