is a major highway on the islands of HonshÃ
« and KyÃ
«shÃ
« in Japan. It follows the old SanyÃ
Âdo westward from the city of Osaka, Osaka Prefecture in the Kansai region to the city of KitakyÃ
«shÃ
« in Fukuoka Prefecture, passing through the San'yÃ
 region en route. Between HyÃ
Âgo Prefecture and Yamaguchi Prefecture it parallels the SanyÃ
 Expressway; it crosses the Kanmon Straits through the Kanmon Roadway Tunnel. Its total length is 533.2 km. At its Osaka terminus, it meets Route 1; at its western terminus, it links with Routes 3 and 10.
Route data
- Length: 533.2 km (331.4 mi)
- Origin: Umeda, Kita-ku, Osaka (originates at the terminus of Routes 1, 25 and 176 and the origins of Routes 26, 163 and 165)
- Terminus: Moji-ku, Kitakyushu (ends at the origins of Routes 3 and 10)
- Major cities: Kobe, Himeji, Himeji, Okayama, Kurashiki, Fukuyama, Hiroshima, Iwakuni, Shimonoseki
History
Overlapping sections
- From Nishinomiya (Fudabasuji intersection) to Kobe (San'nomiya-East intersection): Route 171
- From Kobe (Higashi-Shiriike intersection) to Akashi (Kariguchi intersection): Route 28
- From Kobe (Higashi-Shiriike intersection) to Akashi (Kokubo intersection): Route 250
- From Himeji to Taishi Town (Taishi-Kamiota IC): Route 29
References