P361 - Japan - Seto Ohashi Bridge

Seto Ohashi Bridge, Japan

The Great Seto Bridge or Seto-Ohashi Bridge, is a series of double deck bridges connecting Okayama and Kagawa prefectures in Japan across a series of five small islands in the Seto Inland Sea. Built over the period 1978 - 1988, it is one of the three routes of the Honshū-Shikoku Bridge Project connecting Honshū and Shikoku islands. At 13.1 km long, it ranks as the world's longest two-tiered bridge system.
Crossing the bridge takes about 20 minutes by car or train. The ferry crossing before the bridge was built took about an hour. The toll from Kojima, Kurashiki (Okayama Prefecture on the Honshū side) to Sakaide (Kagawa Prefecture on the Shikoku side) is ¥3,500, and vice-versa.
The bridges carry two lanes of highway traffic in each direction (Seto-Chūō Expressway) on the upper deck and one railway track in each direction (Seto-Ōhashi Line) on the lower deck. The lower deck was designed to accommodate an additional Shinkansen rail line in each direction.

濑户大桥是日本一座位于本州（冈山县仓敷市）到四国（香川县坂出市）之间，跨越濑户内海的桥梁，属于本州四国连络桥路网的三条路线之一。全桥由多座吊桥、斜张桥与梁桥连结，构成庞大的桥梁群。
该桥在1978年（昭和53年）10月10日开工，施工耗时9年个月，到1988年（昭和63年）4月10日始全面通车。该桥为公路铁路两用桥，上层为4车道的高速公路（濑户中央自动车道），下层为JR四国本四备讃线。

References sources : wikipedia, gavinangel.com