What is the purpose of door safety straps?

The purpose of door safety straps is to serve as a warning mechanism for individuals about the positioning of the jetbridge or air stairs. During the boarding or deplaning process, the safety straps help prevent accidents by signaling to crew members and passengers when the door is not fully secure or when there may be a risk related to the opening or closing of the doorway. This safety feature ensures that individuals are aware of their surroundings and helps maintain a safe environment as passengers embark or disembark the aircraft.

In contrast, while other options may seem plausible at a glance, they do not accurately define the specific function of door safety straps. For example, straps are not intended to securely close the door, assist in boarding, or hold the door in place during flight; those functions are fulfilled by different aircraft mechanisms and procedures.