South Dakota State DOT Shipping Regulations, Limitations, Rules, and Laws for Trucking of Oversize and Over Weight Loads Over the Roads and Highways
Legal Loads Limitations in South Dakota
Length: There is currently “no set maximum” for vehicles. The trailer length maximum is 53’.
Width: 8’ 6” wide.
Height: 13’ 6” tall.
Weight: 80,000 lbs. GVW, 20,000 single, 34,000 tandem.
Overhang: 3′ in the rear and 6′ in the front.
Routine Trucking Permits in South Dakota
Routine over-weight, oversize shipping, trucking, and transport permits:
Length: Since STATE NAME has no said length restrictions your overall length approval will depend on your proposed route.
Width: 16′ wide on four lanes roads and highways and 15′ on two-lane roads and highways. Up to 20′ wide on Interstate highways has been approved routinely.
Height: 15′ is about the most you can get away with on routine permits and main routes. Anything taller than that off of the main roads should prepare to have a route survey performed.
Weight: STATE NAME is somewhat difficult in weight determination. If you are over 120,000 lbs or have any extremely heavy axle groupings you will be considered a super-load. All applications for permits will a computer analysis was done anything that fails is then evaluated by the district bridge supervisor for further review. If you are under 100,000 pounds and main road routing is proposed you will probably get permitted routinely. Remember this, however; anything for any amount of time can happen in this state when extreme weights are considered.
Overhang: It doesn’t get much better than this; 30′ rear and 15′ front for overhang.
Travel Times and Restrictions in South Dakota
Permitted travel times and restrictions in South Dakota:
Important info: See the South Dakota DOT current route restriction report. No weekend travel is permitted in STATE. You can request to travel on the weekend when you are applying for your permit, however. They have been known to grant weekend travel to loads that are say 14′ in width or a little on the heavy side but do not count on approval. Travel is not permitted on the following holidays: New Year’s day, Good Friday, Memorial day, Independence day, Labor day, Thanksgiving day, and Christmas day. The permit office is also closed on these days as well.
When Pilot Cars Are Required in South Dakota
Pilot Car and Escort vehicle information:
Length: If the load is 75′ to 95′ on a 2-load road you will need one rear pilot car (escort).
Width: 10′ 6″ to 12′ wide on a 2-lane road requires 1 front pilot car. On a 4-lane road up to 12′ wide requires no escorts. When the load is 12′ 1″ to 14′ wide 1 front and 1 rear pilot car (escort) is required on all 2 lane roads and 1 rear on all 4 lane roads. For loads 14′ 1″ – 15′ wide 1 front and 1 rear pilot car (escort) is required. 15′ 1″ to 16′ wide on 2 lane requires 2 front pilot cars (escorts) and 1 rear pilot car (escort). On 4 all-lane roads 1 front and 2 rear pilot cars (escorts) are required. If you do have a permit for weekend travel you will be required to have a police escort. Districts and Parkways may require additional escorts as well. Vehicles traveling with a width of over 14′ wide will not be allowed to travel on Fridays except on Parkway. The maximum width allowed on the Parkway is 16′ and must be accompanied by a police escort if over 15′.
Height: If the height of the load exceeds 15′ a front high pole card is required. For South Dakota vertical clearances they have a list of the bridge heights online here.
Weight: Check with the State to see if your weight class will require a pilot car/escort.
Overhang: If the front overhang is over 10′ on 2 or 4-lane roads 1 front pilot car (escort) is required. If the rear overhang exceeds 10′ on a 2 or 4-lane road one rear escort is required.
South Dakota bridge weight limit map.
Pilot Car Requirements and Certifications in South Dakota
Pilot car and escort vehicle requirements in South Dakota:
All pilot cars/escort vehicles must display a bumper or roof-mounted “OVERSIZE LOAD” sign visible from both the front and rear of the vehicle. The sign must be at least 5′ long and 12″ in height, yellow in color with black letters no less than 10″ tall and 1 1/2″ in width. Vehicle must have 2 safety flags red or orange in color, and be a minimum of 18″ of length and/or height mounted at a 40 to 70-degree angle on all 4 corners of the vehicle. Company identification signs must be placed on both sides of the pilot car (escort vehicle) displaying the name of the company, and phone number and be placed on both the left and right-hand sides of the vehicle. These signs must be no less than 8″ tall x 12″ wide and identity writing must be plainly legible. The vehicle must be equipped with a horizontally mounted rotating (or strobe) amber-colored flashing light which must be visible from a 360-degree angle from a minimum of 500 feet. Vehicles must be equipped with a CB radio or 2-way communication device, 2 – 5 pound fire extinguishers type A, B, and C, a sign with the word “STOP” on one side and “SLOW” on the other with dimensions of no less than 18″ in diameter with a minimum of 6″ letters. A red safety-colored flag with a handle no less than 18″ square, 3 reflective emergency road triangles or 18″ traffic cones, 2 OVERSIZE LOAD banners (yellow with black lettering), and a safety-colored (red, orange, yellow, or lime green) vest, jacket or shirt (used while directing traffic).
For a vehicle to qualify; all pilot car/escort vehicles must have a gross weight of over 2,000 pounds but also have a manufacturer’s gross weight rating of fewer than 26,000 pounds.
South Dakota DOT Information:
South Dakota Division of Highway Patrol
Capitol Building, Pierre, SD 57501-5070
Charleston, WV 25305
Help telephone line: 605-773-7144
Hours: Monday – Friday 5:00 am – 5:o0 pm
Central Time Zone
Click here for the State DOT Website for oversize and overweight hauling permits.
The information contained in these pages is research information primarily for use by oversize and overweight trucking company drivers, dispatchers, and pilot car companies. While every effort is put into maintaining the accuracy of this information you must absolutely verify this information with the South Dakota State DOT Permits office before commencing movement.