The is a national expressway in the Chūgoku region of Japan. It is owned and operated by West Nippon Expressway Company.
Overview The expressway is officially referred to as the Chūgoku-Ōdan Expressway Okayama Yonago Route.
The route connects the city of Yonago with the Chūgoku Expressway in Okayama Prefecture. From the terminus at Yonago Interchange, there are plans to extend the route northward to the terminus of the city of Sakaiminato.
The first section of the expressway was opened to traffic in 1989 and the entire route was completed in 1992. The route was originally 2 lanes only, one in each direction. However expansion to two lanes in each direction has proceeded gradually over the years. Expansion of the southern half (between Ochiai Junction and Hiruzen Interchange) was completed in 2011.
List of interchanges and features
IC - interchange, SIC - smart interchange, JCT - junction, SA - service area, PA - parking area, BS - bus stop, TN - tunnel, BR - bridge
No.NameConnectionsDist. fromOriginBus StopNotesLocation(15)Ochiai JCT Chūgoku Expressway0.0ManiwaOkayama1Kuse IC National Route 1813.2○PAUeno PA7.2TNSuribachiyama Tunnelnorthbound: southbound: 2Yuhara IC National Route 313Hōjō Yubara Road (planned)15.6◆Bus stop closedTNTamadayama Tunnelnorthbound: southbound: BSFutagawa BS24.0◆Bus stop closedSAHiruzen-kōgen SA32.53Hiruzen IC National Route 48233.5TNMihirayama TunnelLength - KōfuTottoriTNMiyaichi Tunnelnorthbound: southbound: 4Kōfu IC National Route 181 National Route 183 National Route 482Kōfu Miyoshi Road (planned)48.9○TNNeubara TunnelLength - Hōki5Mizoguchi ICTottori Prefectural Route 45 57.2○5-1Daisen PADaisen-kōgen SICTottori Prefectural Route 326 61.7○TBYonago TB66.1Yonago6(16)Yonago IC/JCT San'in Expressway National Route 43166.5JCT:Northbound exit onlyIC:Southbound entrance onlyThrough to Sakaiminato (planned)
External links West Nippon Expressway Company