What should drivers do to ensure their trailer is properly secured during coupling?

To ensure that a trailer is properly secured during coupling, verifying that the locks are fully engaged is the most crucial step. The locks, typically known as the fifth wheel locks or kingpin locks, are responsible for securing the connection between the tractor and trailer. If these locks are not fully engaged, the trailer may detach while driving, leading to potential accidents, cargo loss, or injury.

When the driver checks that the locks are engaged, they confirm that the hitch is securely holding the trailer, which is critical for safe operation on the road. This action prevents unforeseen disconnections that could occur due to vibrations or movements as the vehicle operates.

While checking air pressure, raising the landing gear, and checking for clearance around the trailer are important safety checks in their own right, they do not directly ensure the trailer’s connection to the tractor. Proper coupling and securing the locks take precedence in maintaining the vital connection between the two units.