Permits Canada obtains oversize and overweight permits for South Dakota for trucks and loads over the legal width, height, length or weight.
South Dakota legal dimensions and weight
A truck and load within these limits needs no oversize or overweight permit in South Dakota.
| Width | 102 in (8 ft 6 in) |
|---|---|
| Height | 14 ft |
| Length | 53 ft semitrailer |
| Gross weight | 80,000 lbs on the Interstate; other highways per axle/bridge formula |
South Dakota oversize permit rules
| Permits offered | Single trip, 30-day temporary, extended period, interstate, agriculture, longer combination vehicle (LCV), emergency |
|---|---|
| Escorts | Escort required over 16 ft wide on the Interstate and over 20 ft wide on the state highway system; multiple escorts and flaggers if the load extends more than 2 ft into an adjacent lane |
Permits are issued only if the route has the clearances and load capacity for safe passage.
Getting your permit with Permits Canada
- Send us the online oversize / overweight application with your truck, trailer, load dimensions and route.
- A permit agent applies for your South Dakota permit and checks the route conditions.
- Your permit arrives by email with its travel conditions. Oversize and overweight permits can take longer, since the authorities review each application.
Our fee is $40 to $50 CAD per permit, plus the South Dakota state fee, which depends on the dimensions, weight and route.
Also need temporary registration or fuel tax coverage? See South Dakota trip & fuel permits.
South Dakota oversize permit questions
When is an oversize permit required in South Dakota?
When the truck or load exceeds the South Dakota legal limits: width 102 in (8 ft 6 in), height 14 ft, length 53 ft semitrailer.
What is the legal gross weight in South Dakota?
The legal gross weight in South Dakota is 80,000 lbs on the Interstate; other highways per axle/bridge formula. A heavier truck needs an overweight permit.
When are pilot or escort vehicles required in South Dakota?
Escort required over 16 ft wide on the Interstate and over 20 ft wide on the state highway system; multiple escorts and flaggers if the load extends more than 2 ft into an adjacent lane.
How much does a South Dakota oversize permit cost?
Permits Canada charges $40 to $50 CAD per permit, plus the South Dakota state fee, which depends on the dimensions, weight and route.
Last reviewed October 2026. Rules change; your permit agent confirms them for each move. All provinces and states