South Carolina Highway 20

South Carolina Highway 20 Truck (SC 20 Truck) is a 5.3-mile-long (8.5 km) truck route that has approximately half its path within the city limits of Abbeville. It has concurrencies with SC 71 Truck and SC 28.

It begins at an intersection with the southern terminus of SC 203 Truck (South Main Street) in the south-central part of Abbeville, which is in the southeastern part of Abbeville County. This is also the southern terminus of SC 71 Truck. SC 20 Truck and SC 71 Truck begin concurrent with SC 72. The three highways travel to the west-southwest. Immediately, they curve to the southwest and travel under a railroad bridge that carries some railroad tracks of CSX. They cross over Blue Hill Creek and curve to the south-southwest. They pass the Abbeville Area Medical Center and curve back to the southwest, before leaving the city limits of Abbeville. They pass Piedmont Technical College's Abbeville County Campus before intersecting SC 28. Here, the truck routes turn right, off of SC 72 and onto SC 28.

The three highways travel to the northwest and then pass Westwood Elementary School. They travel through rural areas of the county, passing a United States Department of Agriculture Service Center, the Pete Smith Sports Complex, and the Abbeville County Industrial Park. They cross over the aforementioned CSX rail line for a second time. They have an intersection with the eastern terminus of Old Calhoun Falls Road and the western terminus of Haigler Street, the former of which leads to the Abbeville County Law Enforcement Center, the Sheriff's and magistrates's offices, and detention center. They curve to the north-northeast and then intersect SC 71, where SC 71 Truck ends. SC 20 Truck and SC 28 curve to the northeast and intersect the northern terminus of SC 28 Conn. (North Main Street) and the western terminus of SC 20 Conn. (Hill Road). Here, SC 20 Truck ends, and SC 28 turns left, to the north-northwest.[13]

The entire route is in Abbeville County.

Location	mi[11][12]	km	Destinations	Notes
Abbeville	0.000	0.000	SC 72 east (Greenwood Street) / SC 71 Truck begins – Greenwood South Main Street south – Cedar Springs SC 203 Truck north (South Main Street north) to SC 20 – Due West, Anderson, Abbeville Business & Historic District	Southern end of SC 71 Truck and SC 72 concurrencies; southern terminus of SC 20 Truck, SC 72 Truck, and SC 203 Truck
​	1.960	3.154	SC 28 east / SC 72 west – McCormick, Augusta, Calhoun Falls, Mount Carmel, Athens	Northern end of SC 72 concurrency; southern end of SC 28 concurrency
Abbeville	4.870	7.838	SC 71 / SC 71 Truck ends – Abbeville, Lowndesville	Northern end of SC 71 Truck concurrency
​	5.350	8.610	SC 28 west – Anderson, Antreville North Main Street (SC 28 Conn. south) to SC 71 Hill Road east (SC 20 Conn. east) – Due West	Northern end of SC 28 concurrency; northern terminus of SC 20 Truck and SC 28 Conn.; western terminus of SC 20 Conn.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

South Carolina Highway 20 Connector (SC 20 Conn.) is a 0.870 miles (1.400 km) connector route, partially in the northwestern part of Abbeville. It connects SC 28 and SC 28 Conn. with SC 20. The highway is unsigned for its entire length.[15]

The entire route is in Abbeville County.

Location	mi[14]	km	Destinations	Notes
​	0.000	0.000	North Main Street south (SC 28 Conn. south) to SC 71 – Burt-Stark Mansion SC 20 Truck south / SC 28 east – McCormick, Abbeville County Law Enforcement Center, Sheriff's and magistrates's offices, Detention center SC 28 west – Anderson, Antreville	Western terminus of SC 20 Conn.; northern terminus of SC 20 Truck and SC 28 Conn.
​	0.870	1.400	SC 20 – Due West, Abbeville, Abbeville High School	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

South Carolina Highway 20 Connector (SC 20 Conn) is a 1.090 miles (1.754 km) connector route and is also known as Clinkscales Road. It connects SC 20 with SC 252 in Craytonville as the SC 20 mainline crosses over SC 252 on an overpass without a direct interchange. The connector route is signed.[17]