South Dakota CDL Practice Test 2026 & South Dakota DPS Rules
Prepare for your commercial driver's license with the official South Dakota exam curriculum. TruckerPass combines the 985 federal FMCSA questions with South Dakota-specific commercial vehicle limits, air brake testing, and the 2026 Modernized Pre-Trip inspection.
South Dakota High-Speed Interstates & Black Hills Grades
- South Dakota features an 80 MPH interstate speed limit; high speeds dramatically increase stopping distances and tire heat buildup.
- Black Hills region (US-16A, US-385) features tight rock tunnels with clearances as low as 10 feet; trucks must use truck routes only.
- Long Combination Vehicles (up to triple trailers) operate legally under state permit on designated South Dakota corridors.
- South Dakota DPS requires an 80% passing score on the 50-question CDL test.
Official South Dakota Test Format
- Licensing Agency: South Dakota Department of Public Safety (DPS)
- General Knowledge: 50 questions, 80% to pass (at least 40 correct).
- Air Brakes Endorsement: 25 questions, 80% to pass (required for air-equipped rigs).
- Combination Vehicles: 20 questions, 80% to pass (Class A tractor-trailers).
- Modernized Pre-Trip Inspection: 4-Zone component walkaround + 4-Step air brake test.
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