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South Dakota Frost Laws, Seasonal Load Weight and Speed Restrictions – 2019

Spring Load Restrictions - Timing and Duration:

It is the Department's position to not implement Spring Load Restrictions any earlier than necessary. The Department monitors the daily high/low temperatures at numerous locations throughout the state. The high/low temperatures are used to calculate accumulated freeze and thaw indexes. The Department relies heavily on the existing highway conditions and experience of its field personnel when making the final decision of when to implement and remove load restrictions. When posted, axle weights may be restricted to 6, 7, or 8 tons and are identified by color on the Load Limit Restriction Map found at the Web page below.

South Dakota DOT Spring Load Limits:

http://www.sddot.com/travelers/loadlimits/

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