The push bar to open sign should be fixed to every fire exit door with a push bar so that people are doubly aware that they cannot block the routeeveryone knows how to open it in an emergency. Place it so the large glowing area is directly behind the bar. This sign glows in the dark so, even when lights go out, it still does its job.

 

Fixing requires anything as simple as sticky pads, 'No-nails' type adhesive or double-sided tape