Trial Study on Visual Recognition of Cross-channel Indication Signs in Limited-visibility Tunnels

Abstract

For the problem that evacuation personnel cannot find evacuation location and route quickly and accurately when there is a fire in tunnel, by using eye-tracker to record eye data and selecting X-angle and Y-angle space position indicator to research target awareness, and compared and analyzed the visual recognition, orientation and functionality in different cross-channel indicators at different distances for different groups. The trial results showed that cross-channel indicator signs in existing tunnel lack visual recognition and induction. After adding LED-induced flashing signs and evacuation indicator pattern within green and white edges into cross-channel, visual recognition was improved significantly. Evacuation personnel can better evacuate in condition of limited- visibility and unclear direction and can timely find the evacuation location and escape route so that people can improve self-help ability when there is a fire in tunnel.