South Dakota OSOW Regulations (SDDOT)

Legal Dimensions (No Permit Required)

• Width: 8'6"
• Height: 14'
• Length: 53' (semitrailers)
• Gross vehicle weight: 80,000 lbs

Legal Weights (No Permit Required)

• Single axle: 20,000 lbs
• Tandem axle: 34,000 lbs

Escort Vehicle Requirements

When Escorts Are Required

Interstate Highways

• Over 16' wide: 1 escort required

Most State Highways

• Over 20' wide: 1 escort required

Multiple Escorts Required When:

• Load extends more than 2 feet into adjacent driving or passing lanes, OR
• Traffic cannot pass without permit vehicle or passing vehicle driving on shoulder

Operating Times

Standard Hours

• 1/2 hour before sunrise to 1/2 hour after sunset
• Including Saturday and Sunday

Contact Information

• Website: https://dot.sd.gov/
• State: South Dakota
• Agency: South Dakota Department of Transportation (SDDOT)

Regulatory References

• South Dakota Department of Transportation
• https://dot.sd.gov/
• https://jjkellercompliancenetwork.com/regsense/oversize-and-overweight-movements-south-dakota

Last Updated: 2025-11-11

OSOW publishes South Dakota regulation references as public guidance; field teams should still validate route-specific constraints before dispatch.

If your move requires managed execution, request dispatch support to align permits, escort assignment, and operational timing.

OSOW publishes South Dakota regulation references as public guidance; field teams should still validate route-specific constraints before dispatch.

If your move requires managed execution, request dispatch support to align permits, escort assignment, and operational timing.