Clearance & Route Rest.
Comm. Driver License
Comm. Lic. Plates
IFTA (Fuel Tax)
IRP (Int'l Registration)
Laws & Rules
Motor Carrier Training
Size & Weight
UCR (Unified Carrier Registration)
~ Check Truck Size & Weight Configurations ~
For complete information, please go to Chapter 4 - Permits of the Motor Carrier Handbook.
Carriers operating in South Dakota must ensure that they are operating within the
maximum length, height, width and axle limitations
and that they meet South Dakota bridge and weight laws. Information can be obtained
by contacting the following agency or visiting the South Dakota Highway Patrol
Motor Carrier Services web page at: http://dps.sd.gov/enforcement/highway_patrol/motor_carrier_srvs_info.aspx
For more information regarding length, height, width, and axle limitations, please contact:
Below is a brief synopsis of size & weight regulations. For complete information and
illustrations, please refer to the SD Motor Carrier Handbook, Chapter 4: Permits.
Vehicle Size Regulations
The maximum height for any vehicle, including load, is 14 feet.
1. A vehicle with a load of baled hay is permissible up to 14 feet 3 inches
2. Farm Machinery and Fire Equipment: No Height Limit
The maximum width of any vehicle is 102 inches (8 feet 6 inches).
1. Farm Machinery Operated by a Farmer: No Width Limitation except on the interstate system (daylight hours only)
Length limitations are illustrated in Table 5. Unless specifically addressed, the length limits shown only apply to the vehicle, and do not apply to the load carried on it. They are exclusive of the load overhang, retractable extensions used to support loads, and safety or energy conservation devices such as mirrors, turn signal lamps, hand holds, flexible fender extensions, and mud flaps. Retractable extensions must be retracted if not being used to support overhanging loads.
Loads or retractable extensions on any vehicle may not extend more than four feet beyond the rear bumper, bed or body, or more than three feet beyond the front bumper, bed or body of the vehicle carrying the load.
Vehicle Weight Regulations
Axle Group Limitations
The maximum allowable weight for all individual axles and axle groups is limited by statute:
Group Type - Maximum Allowable Weight
Single Axles - 20,000 pounds
Tandem Axles - 34,000 pounds
Tridem Axles - 42,000 pounds
Other Axle Groups - based on the Bridge Weight Formula.
The weight supported on a tire may not exceed 600 pounds per inch width of tire, if that tire is on:
The weight supported by tires mounted on other axles may not exceed 500 pounds per inch width of tire.
- A steering axle;
- An axle equipped with dual tires; or
- A trailer towed by a vehicle with a Gross Vehicle Weight Rating of 11,000 pounds or less.
South Dakota Highway Patrol
Motor Carrier Services
118 West Capitol Avenue
Pierre, SD 57501-2000
Motor Carrier Handbook