These ubiquitous objects are indications of how to shift your current environment. There is a sense of urgency connected with exit signs, as they are posted generally for the purpose of rapid evacuation. In a dream, they are the indication that your current level of risk is acceptable because you know where to move to reduce that risk when you feel the need. What situation in your life feels slightly uncomfortable such that you would prefer to know where the nearest exit is?
[1]Desire to get out of a particular situation.
[2]A way out of trouble, 1 Cor. 10:13
[3]