Cars are the most practical way to travel with a New Zealand. A secure, well-ventilated carrier prevents the rabbit from moving around the vehicle and protects it in the event of sudden stops. The carrier should be large enough for the rabbit to turn around, given the breed's substantial size.
Heat is the central danger. Rabbits tolerate heat poorly, and a parked car can become lethal within minutes, so a New Zealand should never be left in a stationary vehicle. Travel during cooler parts of the day and keep the cabin air-conditioned in warm weather.
Familiar bedding, a supply of the rabbit's normal hay, and access to water help reduce stress on longer drives. Because rabbits can develop digestive trouble when anxious, keeping food intake steady and minimizing handling at stops supports gut health en route.