For most owners, the car is the main way a Harlequin will travel, whether to a show, a veterinary appointment, or a new home. A secure, well-ventilated carrier is essential, both to keep the rabbit safe in the event of sudden braking and to provide a familiar enclosed space.
Rabbits are sensitive to heat, so a parked car can become dangerous quickly. The vehicle should be kept cool, the carrier shaded, and the rabbit never left alone in a closed car in warm weather.
Lining the carrier with familiar bedding and offering hay and a water source helps reduce stress on longer trips. Keeping the cabin calm and avoiding loud noise makes the journey easier for an animal that is naturally wary of disturbance.