DEVELOPMENT OF A CCTV-CAMERA-BASED ROAD VISIBILITY INFORMATION SYSTEM (RVIS)

摘要

To secure road traffic safety under poor visibility conditions is a vital responsibility of roadrnadministrators. An effective road visibility information system has been sought for roadrnadministrators and road users. The authors have experimentally developed a new roadrnvisibility information system (RVIS) that produces visibility information calculated fromrnimages of CCTV cameras that are installed on national highways. The system stores andrnaccumulates images sent from CCTV cameras to quantify the image data to automaticallyrncompute visibility indexes that identify levels of road visibility. The visibility indexesrnproduced by RVIS allow the road administrators to collect and accumulate visibility data andrnto provide visibility information to the public by Internet, e-mail and mobile phone. Thisrnpaper reports on the RVIS and the results of its feasibility study during the winters ofrn2006-2007 and 2007-2008.