There are laws in place that require vehicles to have tires with good traction. Known as traction laws, the laws make sure that motorists have enough tread to stop on wet or slick roads.
Traction laws aren't always in place. For instance, in the summer months, there may be no traction law active. However, if it snows, the traction law may be enforced. Under this law, you're asked to use snow tires, tires made for mud and snow or a four-wheel drive vehicle. In any case, your tires must have at least one-eighth inch of tread.
Another good thing to know is that there are chain laws in Colorado. Chain laws force drivers to use chains on their tires under certain circumstances. For example, if there is a significant amount of snow on the roads, the Colorado Department of Transportation may activate the Passenger Vehicle Chain Law and require all vehicles to have chains or alternative devices for better traction.
The goal of these laws is to help reduce the number of crashes on the roads and to keep people safe. Drivers who don't follow the laws could slide off the roads or cause crashes that would otherwise be avoidable. Motorists who don't follow the laws may be fined up to $130 for driving without the correct traction. If they end up blocking the roadway because of not following the laws, then they may be fined up to $650.
If you're struck by someone who isn't following the law, it gives you a good basis for a case against them. You can pursue a claim through their insurance company.
Source: Colorado Department of Transportation, "Fact Sheet —Traction Law and Passenger Vehicle Chain Law," accessed Dec. 18, 2017