What does 'carrying a car' mean?

[LaFelix]

Carrying a car is a practice aimed at saving costs such as toll fees, fuel expenses, and tire wear. It involves long-distance drivers placing one vehicle onto the cargo bed of another and driving it as if it were cargo, making it appear as though they are carrying a car on their back. While this method is effective and cost-saving, it is highly dangerous and can lead to major traffic accidents. It has been deemed illegal by some traffic organizations and is now prohibited. Below is additional information: Principle: Carrying a car is done to save on toll fees, fuel expenses, tire wear, and other costs. Some long-distance drivers place one vehicle onto the cargo bed of another and drive it as if it were cargo, making it appear as though they are carrying a car on their back.