Description: The SDDOT LRS. The measures are in miles and highway naming convention follows the historical standard of the SDDOT Roadway Environmental system (RES) database. EX. Highway 14 is stored as 014. Highway 212 is stored as 212. Directionality and subordinate routes also follow the RES naming convention with specific character spacing.
Description: A feature set of frontage roads. These roads are maintained by SDDOT but not part the State highway system, Many roads coincide with the NSTRI local road system.