Orbit South Dakota Interstate speed limits
The posted limits on every Interstate in South Dakota, measured along each road: the limit you'll see most, and the range from the slowest stretch to the fastest. The highest Interstate limit in South Dakota is 80 mph.
| Interstate | Usually | Range |
|---|---|---|
| I-29 | 80 mph | 65 to 80 mph |
| I-90 | 80 mph | 65 to 80 mph |
| I-190 | 50 mph | 45 to 60 mph |
| I-229 | 65 mph | 55 to 65 mph |
Posted limits as of October 2026, from state and federal road data and © OpenStreetMap contributors, measured by length of road. Work zones, weather and signs can set a lower limit; always follow the posted sign.
Other states
AlabamaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming
Orbit shows the limit for the road you're on · coming soon to iPhone and CarPlaySee Orbit SI