traffic sign warnings are provided to a driver by optically scanning an area in front of the moving vehicle to obtain an image of said area in front of the moving vehicle . road signs are recognized and their importance categorized . a driver &# 39 ; s eyes are continuously scanned to determine whether the driver &# 39 ; s eyes &# 39 ; ever focus on , or are directed to a detected and recognized road sign . multiple different visual and / or audible warnings or alarms are generated based on the nature of a road sign , its proximity to the moving vehicle , and the driver &# 39 ; s determined awareness of the road sign .