Wed Apr 13 07:11:02 CDT 2022
South Dakota Oversize & Heavy Haul Transport Regulations
Important: We are not a permit service and we do not arrange permits for carriers. All information provided below is for information purposes only. Always read permits and provisions carefully as we cannot guarantee the accuracy of information provided below.
Transporting oversized loads in Tennessee requires careful planning to comply with state wide load regulations and safety regulations for transporting oversized loads. Whether you’re managing heavy equipment transport or coordinating oversize freight solutions, understanding these rules ensures smooth, legal moves.
Permit Validity
Single-trip permits are valid for 6 days and must be obtained before entering Tennessee.
Operating Hours
Monday–Saturday: ½ hour before sunrise to ½ hour after sunset.
Note: No Sunday travel (except for overweight-only loads, which may move continuously).
Restricted Travel Areas & Times
- Loads over 12’6″ wide or 85′ long are prohibited in city limits during 7–9 AM and 4–6 PM (weekdays).
- No movement on major holidays.
Legal Dimensions for Heavy Haul Trucks
- Length: 50 feet max (kingpin to trailer end). Utility poles over 75 feet require permits.
- Width: 8 feet 6 inches
- Height: 13 feet 6 inches
- Weight Limits: 80,000 pounds Gross
- Axle Limits:
- Single Axle: 20,000 pounds
- Tandem Axle: 34,000 pounds
Routine Permit Limits
- Width: Up to 16 feet
- Height: Up to 15 feet
- Weight:
- 5 axles: 100,000 pounds
- 7 axles: 140,000 pounds
- Superloads: >16′ wide or >15′ high (rarely permitted without proof of public necessity)
Escort Requirements for Oversized Load Transportation
- Length:
- >85 feet: 1 escort
- >120 feet: 2 escorts
- Width:
- Interstates/4-lane: >12’6″: 1 escort, >14′: 2 escorts
- 2-lane roads: >10′: 1 escort
- Height: >15′ (if approved): 1 escort with height pole
Safety Regulations for Transporting Oversized Loads
- Equipment Orientation: Bulldozer blades over 10’6″ wide must face rearward
- Mandatory Markings:
- “OVERSIZE LOAD” signs (front and rear) required for width >10′ or length >75′
- Red flags on widest points and rear overhangs >4′
- Amber strobe light required for loads between 75′–85′ long
Key Takeaways for Logistics Management
- Route planning for overweight vehicles to avoid city curfew times.
- Check escort requirements before moving.
- Apply early for superload approvals.
- Use required signs, flags, and lights to stay compliant.