What is an effective way to prevent unauthorized access to a boom lift?

Securing the boom lift by locking it and removing the keys is a highly effective method for preventing unauthorized access. This approach directly addresses the risk of unauthorized use by ensuring that only individuals who have the proper training and permission can operate the equipment. By locking the lift, you create a physical barrier that deters unauthorized personnel from gaining access. Removing the keys further reinforces this security measure, as it restricts the ability to operate the lift even if someone attempts to bypass the lock.

Other choices, such as leaving the lift unlocked for quick access, can lead to significant safety hazards, as unauthorized individuals may easily access and misuse the equipment. Simply notifying workers not to touch the lift lacks the enforceability needed to prevent unauthorized access, as verbal communication alone does not provide any physical barriers. Displaying warning signs can inform about risks but does not prevent access or use, making it an inadequate security measure on its own.