In order to secure the safety of national land and the life on it, it is necessary to maintain the safety and reliability of road traffic. Sophisticated and information-oriented road management activities using ITS will prevent damage due to disasters, and enable prompt rescue and recovery in case of a disaster. In addition, ITS will improve roadside conditions, enable programmed and efficient road management and maintenance works, and assure the safety and comfort of users.
National Route 220 damaged and blocked for 990 hours due to a typhoon
(Tarumizu City, Kagoshima Prefecture).