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NEW JERSEY
New Jersey requires seat belts for dogs not secured in a crate. Drivers with unrestrained dogs can be pulled over and fined between $250-$1,000 for each offense. - Resource
RHODE ISLAND
As of 2012, Rhode Island requires dogs being transported in a vehicle to be in an enclosed area and either secured within a crate, restrained with a harness or pet seat belt designed for use in a vehicle, or under the physical control of a person other than the driver of the vehicle. Violation of the law carries a fine of up to $200 depending on number of offenses.

Does your dog have a seatbelt on? If not, you could be breaking the law
Drivers that allow dogs to stick their heads out the window could be breaking the law – and invalidating their car insurance. Here are the rihere are few things in life as awesome as seeing a dog with its head out the window of a moving car. Sadly, it could cost you your licence and invalidate your car insurance to boot.
Why? Well, the Highway Code states drivers need to ensure ‘dogs or other animals are suitably restrained so that they cannot distract you while you are driving or injure you, or themselves, if you stop too quickly’.
The law recommends a seat belt harness, pet carrier, dog cage or guard as ways of restraining your pet while driving
And Gocompare.com warns that drivers who don’t restrain dogs and cats while on the move are not just breaking the law, they could also be invalidating their car insurance.
That means if you're in an accident, you could be made to pay for any damage to your car AND any other cars involved, not to mention any medical or other costs resulting - something that could easily add up to a five-figure bill.
“Driving with your pet is sometimes a necessity, whether it’s a short trip to the vet or a longer trip for a weekend way - but making sure they are properly controlled is essential for the safety of everyone in the car,” said Gocompare car insurance spokesman Matt Oliver.
“The law is clear – you must secure your animal while in a car – therefore if you don’t do this and an animal roaming freely around the vehicle is said to have contributed to causing an accident, then an insurance company could be well within their rights not to pay out on a claim.”