South Carolina Highway 421
|Maintained by SCDOT|
|Length:||10.5 mi (16.9 km)|
|Existed:||1952 – present|
|South end:||US 1 / US 78 / US 278 near North Augusta|
|SC 126 in Clearwater
SC 191 in Warrenvile
SC 118 near Aiken
|North end:||US 1 / US 78 near Aiken|
SC 421 begins where it splits off from the Jefferson Davis Highway (U.S. Route 1/U.S. Route 78) near the city of North Augusta, just south of an interchange with U.S. Route 278 and SC 125. The highway then heads northeast, paralleling the Jefferson Davis Highway, before intersecting SC 126 in the town of Clearwater. In the town of Warrenville, SC 421 intersects SC 191, then it turns more easterly, before ending back at the Jefferson Davis Highway, approximately four miles west of the city of Aiken.
The entire route is in Aiken County.
|North Augusta||0.0||0.0||US 1 / US 78 / US 278 (Jefferson Davis Highway)|
|0.3||0.5||US 278 / SC 125||Interchange|
|Clearwater||2.0||3.2||SC 126 (Belvedere-Clearwater Road)||Southern terminus of SC 126|
|Warrenville||8.3||13.4||SC 191 (Old Graniteville Highway)||Southern terminus of SC 191|
|Aiken||10.1||16.3||SC 118 (Hitchcock Parkway)|
|10.5||16.9||US 1 / US 78 (Jefferson Davis Highway)|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Google Maps (2010). Jefferson Davis Hwy/US-1 N/US-278 E/US-78 E to Augusta Rd (Map). Cartography by Google. http://maps.google.com/maps?f=d&source=s_d&saddr=Jefferson+Davis+Hwy%2FUS-1+N%2FUS-278+E%2FUS-78+E&daddr=S+Carolina+421+N%2FPoplar+St+to:Augusta+Rd%2FSC-421+to:Augusta+Rd%2FSC-421+to:33.562154,-81.77565&geocode=FQr8_gEd7O4d-w%3BFZAo_wEdhIAe-w%3BFf6C_wEdBk4f-w%3BFcoVAAIdWC0g-w%3B&hl=en&mra=dme&mrcr=0&mrsp=4&sz=19&via=1,2,3&sll=33.562205,-81.775446&sspn=0.000865,0.002401&ie=UTF8&ll=33.528803,-81.835098&spn=0.110758,0.307274&t=h&z=12.