New Jersey has a law you may not know about it, and you likely violate it this time of year. Did you know even in your own driveway on a cold winter morning you are not allowed to let your car warm up for more than 3 minutes if it’s as cold as 25 degrees? Only if your car has been sitting for three hours or more and only if the temperature is below 25 are you allowed to idle for longer than those 180 seconds. Go over 3 minutes and police are allowed to enforce this obscure law and slap you with a $250 fine for a first offense. Yes, they are even allowed to enforce this on your own property, in your own driveway.

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