When parking a towed vehicle, it is important to never park on:

When parking a towed vehicle, avoiding parking on a hill is crucial due to the increased risk of the vehicle rolling away. Hills can create a slope that significantly affects the stability of a towed vehicle, especially if proper precautions are not taken, such as engaging the parking brake or using wheel chocks. This risk is heightened if the towed vehicle is not properly secured to the towing vehicle or if the hitch or tow bar is not aligned correctly. On a flat surface, grass, or concrete, the likelihood of the vehicle rolling is greatly reduced, making these surfaces more suitable for parking. Ensuring the towed vehicle is parked securely helps prevent accidents and damage.