In 2009 the International Standards Organization (ISO) published a standard for Safety identification - Escape and evacuation plan signs, ISO 23601:2009

Sample Plan:

Links:
ISO 7010:2011 Graphical symbols
Evacuation Plans and Procedures eTool | OSHA's Exit Routes Demonstration #2
UMDNJ Fire and Life Safety Compliance Guide
New ISO standard for building escape and evacuation plans is a potential life saver (2009-03-17) - ISO
New AED sign | International Liason Committee on Resuscitation (Ilcor)
ISO 23601:2009
Google search for AED signs
Clarion Safety Identification Signs
Fire Extinguisher / AED Signs | Cure Inc.