If you drive on I-90, I-29, or the back roads between Rapid City and Sioux Falls, the South Dakota seat belt law affects every trip you take. Here are 12 things every South Dakota driver and passenger should understand before it costs you.
Understanding South Dakota’s Seat Belt Law
1. Adults Fall Under Secondary Enforcement
For drivers and passengers 18 and older, failing to buckle up is a secondary offense. An officer cannot stop your vehicle for this alone, but can add the citation if you are pulled over for something else, like speeding.
2. Drivers and Passengers Under 18 Face Primary Enforcement
If you are under 18, or transporting someone under 18, law enforcement can stop the vehicle solely because a seat belt is not being worn.
3. Minimum Fines
The base fine is $25 for adults and $50 for minors, not counting court costs, which often push the total higher.
4. Points on Your Driving Record
A seat belt citation adds two points to your South Dakota driving record, which can affect insurance rates over time.
Child Passenger Rules
5. Children Under 5 Need a Certified Car Seat
Kids younger than five must ride in a federally approved child restraint system, properly installed according to the manufacturer’s instructions.
6. Ages 5 to 17 Must Wear a Seat Belt
Once a child ages out of a car seat, state law requires a properly fitted seat belt at all times the vehicle is moving.
7. Child Restraint Fines Can Reach $250
Violations tied to child restraints range from $25 to $250 depending on the circumstances, making this one of the costlier mistakes a South Dakota parent can make.
Exemptions Worth Knowing
8. Farm and Off-Road Vehicles
Tractors, farm machinery, and vehicles used strictly on private agricultural land are exempt.
9. Medical Exemptions
A written note from a physician stating that a seat belt is medically inappropriate can exempt a driver or passenger.
10. Older Vehicles and Postal Workers
Vehicles built before 1966 without factory seat belts, along with postal workers actively delivering mail, are excluded from the requirement.
Why This Law Matters in South Dakota
11. Local Crash Data Tells a Story
State safety data shows that a majority of vehicle occupants who died in South Dakota crashes in recent years were not wearing a seat belt, a rate higher than the national average.
12. Winter Roads Raise the Stakes
Icy highways, long rural stretches, and heavy winter gear make crashes more likely across South Dakota’s driving season, and a seat belt remains the simplest way to reduce serious injury.
Final Thoughts
South Dakota’s seat belt law may lean on secondary enforcement for adults, but the fines, points, and real safety risks make buckling up worth it every time you get behind the wheel. This article is for general information only and is not a substitute for advice from a licensed South Dakota attorney.