| Country: | IND |
| Type: | RC |
| Route: | 20 |
| Territories: | Puducherry |
| Maint: | Public Works Department (PWD),Puducherry[1] |
| Length Km: | 9.123 |
| Junction: | RC-18 at Karikalampakkam RC-19 at Embalam |
| Districts: | Puducherry, Cuddlore |
RC-20 or Thavalakuppam–Embalam Road branches out from National Highways 45A at Thavalakuppam and ends at Embalam.
It is passing through the following villages: