Seasonal Weight Restrictions Begin March 1


Monday, Feb. 22, 2021

In accordance with Public Act 300 of 1949, the Michigan Vehicle Code, the Calhoun County Road Department is enacting seasonal weight restrictions beginning at 12:01 a.m., Tuesday, March 1, 2022, and will remain in effect until further notice. These weight restrictions are commonly put in place each year by counties across Michigan, and are intended to help preserve and protect our local roads when they are most vulnerable from freeze thaw cycles that cause road damage. While our local road agencies work throughout the year to improve roads to accommodate commercial vehicles and foster a business-friendly environment, heavy weights during the spring season make the road surfaces more prone to breakage than they are during other times of the year.

According to the County Road Association (CRA), the enforcement of seasonal weight restrictions, commonly known as frost laws, is vital to minimizing damage to Michigan’s road system. Seasonal weight restrictions are a good indicator that spring – pothole season – is here.

During the seasonal weight restrictions period, trucks traveling on “restricted” roads must carry 35% lighter loads and travel at slower speeds.   

Local and state law enforcement agencies may enforce seasonal weight and speed reductions during Seasonal Weight Restrictions. 

For details on Calhoun County’s seasonal weight restrictions and permitting, please visit our website at CRA also offers convenient information on all county seasonal weight restrictions at

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