Central Motorway, formerly Chūō Kōsoku-dōro (中央高速道路) until 1972) is a national expressway in Japan.Officially the expressway is designated as the Chūō Expressway Nishinomiya Route (from Takaido Interchange to Komaki Junction), the Chūō Expressway Nagano Route (from Takaido Interchange to Okaya Junction), and the Chūō Expressway Fujiyoshida Route (from Takaido Interchange through Ōtsuki Junction to Kawaguchiko Interchange, this section being a branch of the main route).[4] These designations do not appear on any signage as all sections are signed simply as the Chūō Expressway.While the Tōmei Expressway follows a coastal route, the Chūō Expressway follows an inland route through the mountainous regions of Kanagawa, Yamanashi, Nagano, and Gifu Prefectures, its highest point (1,015 meters above sea level) being at 157.3 km point sandwiched between the Yatsugatake Mountains and Southern Japanese Alps.Vehicles carrying dangerous materials are forbidden from using this tunnel and must use alternate routes.