Connecticut has a new law going into effect at the end of the month, that is already in place in many states, and which needs to spread to all locales.
The law is against "Ice Missiles".
Ice Missiles are what happens when you don't clean the snow properly off the top of your car, and then go for a drive, shooting snow and ice off the top of your car, onto other cars around you, or passerby's.
True story: I know people who have died from ice missiles. As another car stopped, the ice shot off the roof, and through their windshield, killing them.
So take the extra few minutes and clean all the snow off your car, even if your state doesn't have the law.