According to traffic rules, what is not permitted when carrying items in a trailer on a highway?

Carrying people in a trailer on a highway is not permitted due to safety regulations. Trailers are designed for transporting cargo, not for passenger transport. If an accident occurs, the risk of injury is significantly higher for individuals traveling in a trailer, as it lacks proper safety features such as seat belts and crash protection that are essential in protecting occupants during a collision.

In contrast, carrying items such as bicycles, personal belongings, or tools and equipment is generally allowed, provided that they are secured properly and do not obstruct the driver's visibility or control of the vehicle. Doing so helps ensure that the load maintains balance and stability while driving, which is crucial for safe travel on highways.