Do your drivers have an ICE form in their vehicle? ICE, of course, stands for In Case of Emergency and the form in question is a form that outlines any and all important information about the driver; information that emergency personnel might need and which, depending on the emergency, the driver might not be able to provide.
You can download a driver’s ICE form here. Have each driver fill one out and keep it in a prominent place in the vehicle. It just might save their life in case of emergency.