If you're driving with your pet, Best Cat Litter Boxes you'll need to find a comfortable and safe way for your pet to travel. You can place your pet in a carrier and secure it in the car. Alternatively, you can purchase a seatbelt like harness for your pet that will allow him to be out of the carrier but still safely restrained. It isn't safe to allow your pet to roam freely in the car. He can be seriously hurt in the event of even a minor accident, and he is much more likely to escape and become lost when you make stops.