The reason states require removal of studded tires is two-fold:
- It destroys roads incurring greater repair bills
- The lead from the studs and asphalt dust are hazardous to your health
There are two dates that matter, the date range when studded tires are allowed and the date when they are prohibited. The idea is that bad weather can last later in some years than others. Some states do choose to make a special provision, like Georgia, which only allows studs some years but generally prohibits them.
Most states that allow studs provide a little flexibility by having a second date after the allowed date range that represents when it’s actually prohibited. That’s the date when they’re going to start handing out fines.
States that prohibit Studded Tires entirely (obviously not needed):
Alabama, Florida, Hawaii, Louisiana, Maryland, Mississippi, and Texas.
States that prohibit Studded Tires entirely (that surprised us):
Minnesota, Michigan, Wisconsin, and Illinois.
Below is the best information we could find about studded tires by state. This information comes from Washington State Department of Transportation–be sure to look up your local state Department of Transportation. Also, some cities have statutes that are different than the state. According to AAA.com most states begin passing out fines for driving with studded tires on April 2nd.