To park a vehicle with a trailer on an **uphill slope** without chocks, it is important to ensure that the vehicle does not move. Here we explain how to do it correctly:

- **Rest one of the front wheels on the curb**: This helps prevent the vehicle from moving. On an uphill slope, you should turn the wheel towards the **center of the road**. This position creates a physical barrier that prevents the vehicle from rolling backward.

- **Do not use natural elements as chocks**: Although it might seem like a quick solution, it is neither safe nor allowed to use stones, wood, or other objects as chocks. Chocks must be specific for vehicles.

- **Engage the appropriate gear**: Although leaving the vehicle in reverse or first gear can help, it is not sufficient on its own to secure a vehicle with a trailer on a slope. It is crucial to combine it with resting the wheel on the curb.

By following these steps, you ensure that the vehicle is well secured and safe on an uphill slope.