Sometimes it seems like the elevator door stays open forever and there is a "close door" button for just those times, but does the button work? Elevators are all around us.

One of those specifications stipulates that elevator doors remain open for a minimum of three seconds or more, depending on how close the hallway’s call buttons are located to the elevator shafts.

Elevator doors are required to stay open for at least three seconds no matter what, so at this point, most manufacturers have simply deactivated the button.