South Dakota Oversize Permits

South Dakota (SD) Legal Dimensions

Length: Not overall length mentioned buts for semi-trailer, 53 feet.
Overhang: 3 feet front and 4 feet rear.
Important: Permits are still required for poles, beams, utility poles, and pipelines that exceed length or rear overhang limits.
Width: 8 feet 6 inches.
Height: 14 feet.

Weight: 80,000 pounds Gross.
Steering Axle: Up to 600 pounds are allowed per inch of tire width.
Single Axles: 20,000 Pounds.
Tandem Axles: 34,000 Pounds.
Tridem Axles: 42,000 Pounds.
Loads above 80,000 pounds are allowed on state roadways provided axle and group weights are lawful and the vehicle has a permit for the total weight. However, if you need to travel on interstate routes, you must first get an “Interstate Permit.”

South Dakota (SD) Permits Validity, Restrictions and Operating Time
South Dakota (SD) Permits Validity: South Dakota (SD) oversize permits are valid for 10 days.

South Dakota (SD) Operating Time: One-half hour before sunrise to one-half hour after sunset all seven days of week (Monday to Sunday). On interstate routes, continuous travel is allowed for loads up to 10 feet wide, 14 feet 6 inches high, and 110 feet in length. These loads may also be used within a 2-mile radius of interstate interchanges on state routes. You can go around the clock if your load is overweight but not too heavy.

South Dakota (SD) Seasonal Restrictions on Travel: Seasonal weight restrictions due to spring thaw may be imposed beginning after February 15th. For adjustments, please contact the Permit Office.

South Dakota (SD) Routine Permits Limits

Length: Not mentioned, it depends on routes.
Width: Not mentioned, it depends on routes.
Height: Not mentioned, it depends on routes.

Weight:
Steering Axle: Up to 600 pounds are allowed per inch of tire width. If tire is 11 inches wide, 13,200 Pounds acceptable.
Single Axles: 24,000 Pounds.
Tandem Axles: 46,000 Pounds
Tridem Axles: 60,000 Pounds.
Quad Axles: 68,000 pounds are allowed per inch of tire width.
Important: Registration is needed for the required weight, and extra payments must be paid for a trip permit. Some routes allow heavier weights. When transporting overweight items, both axles must be engaged. Tractor registration must match the weight being transported, otherwise an additional price is charged with the permission.

South Dakota (SD) Escorts/Pilot Cars, Signals and flag Information

Length: More than 130 feet required one escort.
Width:
On interstate routes more than 16 feet required one escort.
On some states routes more than 20 feet required one escort.
Important: Several pilots are required if the load extends more than 2 feet into adjacent lanes or restricts vehicles from passing without driving on the shoulder. A pilot vehicle is required in the Black Hills region for load wider than 10 feet, except on US16 between Rapid City and Keystone, Wyoming, and US 18.

Height: Usually not require any escort.

Flags, Signs and Lights information: All oversized loads must attach flags at all the corners. Flags should be placed on any load that is wider than 8 feet 6 inches or extends beyond the width of the vehicle. In addition, flags are necessary for any load that extends more than 3 feet in front of the vehicle’s bumper or 4 feet beyond the trailer’s rear. If the projection width is less than 2 feet, a single flag is needed; for projections more than 2 feet, two flags are necessary. ‘Oversize Load’ signs must be placed on the front and rear of vehicles that are more than 12 feet wide or 95 feet long, or that run at night. These signs must be reflectorized for nighttime usage. When not required, signage should be covered or removed. Load projections must be lit with amber and red lights and reflectors during nighttime operations. The South Dakota permit includes detailed evening illumination requirements.

South Dakota (SD) Oversize permits Regulations and Information

South Dakota (SD) Oversize Permits Phone Number: (949) 208-2371

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