One simple sign could be the difference  between to be or not to be.
Hours has been lost because of lack of signage. A good signage system. 
On the other hand, we also do the signs to comply and follow with the American with Disabilities Act (ADA), a federal regulation which is a requirement and all the facilities and public buildings. 
 

In the age of information,  the well defined graphics and well designed visual communication is "a must".

Below, some numbers to prove it: