What should be used to prevent a trailer left parked from rolling away?

Using chocks to prevent a trailer left parked from rolling away is a widely recognized and effective safety measure. Chocks are wedge-shaped blocks placed against the wheels of a trailer to create a physical barrier that prevents any movement. They are particularly important when parking on inclines or uneven surfaces where the risk of rolling away is greater.

While brakes, including the parking brake, are essential for stopping and holding a trailer when in use, relying solely on these systems can be insufficient due to potential mechanical failures or the inability to hold under certain conditions. Ramps, on the other hand, are generally used for loading or unloading rather than for preventing movement of a stationary trailer. Chocks provide an added layer of safety and ensure that even if other systems fail, the trailer remains securely in place.