Abstract: A route and site-specific critical data system for emergency responders as they travel and approach an incident site, comprising a field survey database, a computer-executable GIS extension application interfaced with said database, a mobile GPS receiver, and a mobile user interface that includes a display screen capable of touch-screen icon selection including through gloved hands. The user interface mounted within one or more response vehicles displays multiple screen images, map-based, and photograph-based information, detailed text narratives and data in real-time along the entire route to an incident site, including past the public/private road intersection.