How can you prevent the dolly tow bar from flying up during uncoupling?

The key to preventing the dolly tow bar from flying up during uncoupling lies in engaging the coupling latch properly. When the coupling latch is secured according to proper procedures, it ensures that the components remain connected until the appropriate time for uncoupling. This minimizes the risk of the tow bar moving unexpectedly when the dolly is separated from the trailer. Proper engagement of the coupling latch provides stability and prevents sudden shifts that could cause the tow bar to fly upward.

While the other methods may contribute to safety in various scenarios, they do not address the core mechanism of preventing the tow bar from moving during uncoupling. Holding the tow bar could provide temporary control, but it is not a substitute for proper latch engagement and does not ensure the same level of security. Locking the tow bar in place may be a good practice for securing it when not in use, but it does not specifically address the action taken during the uncoupling process. Using a safety chain is also good for additional security, but it is a supplementary measure rather than a primary method to control the tow bar movement.