A single axle caravan with overrun brake is parked on a downhill slope. How do you have to secure it to prevent it from rolling away?

When parking a single axle caravan with an overrun brake on a downhill slope, simply applying the parking brake is not enough because the brake may not hold firmly under the vehicle's weight and slope pressure. German traffic rules require you to also use wheel chocks to physically block the wheels and prevent any movement. Placing chocks in front of the wheels secures the caravan effectively. Options 1 and 2 together ensure the caravan stays put safely. Using just one chock in front and one behind the same wheel is not recommended here because it can be less stable and is not specified for this situation in the rules. Always combine the parking brake with wheel chocks when parked on a slope.