HSBE TOP > Information > Seto-Chuo Expressway
Seto-Chuo Expressway
Huge Double Deck Structures
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The Central route, Seto-Chuo Expressway & JR Seto-Ohashi Line, is for both a highway and a railway. The total lengths of highway and railway are about 39 kilometers and 32 kilometers, respectively. They were opened to traffic in April 1988. This route consists of six long-span bridges (Shimotsui-Seto Bridge, Hitsuishijima Bridge, Iwakurojima Bridge, Yoshima Bridge, Kita Bisan-Seto Bridge, and Minami Bisan- Seto Bridge) which cross the 9.4 kilometers strait. The upper and lower decks of the stiffening girder are for highway traffic and railway. These six long-span bridges are called the Seto-Ohashi Bridges. |
| Items | Between Kobe-Nishi IC and Naruto IC in Seto-Chuo Expressway |
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1. Route 2. Location 3. Length 4. Construction Cost 5. History 6. Present Conditions |
National Highway 30 From: 2722-2, Aza-Karato, Oaza-Hayashima, Hayashima town, Tsukubo-gun, Okayama Pref. (Hayashima IC) To: 3791-1, Kawatsu town, Sakaide city, Kagawa Pref. (Sakaide IC) 37.3km Number of bridges: 42, Total length of the bridges: 20.8 km (Among them, the lengths of Shimotsui-Seto Bridge, Hitsuishijima Bridge, Iwakurojima Bridge, Yoshima Bridge, Kita and Minami-Bisan Seto Bridges are 1,400 m, 790 m, 790 m, 850 m, 1,538 m and 1,648 m, respectively.) Number of tunnels: 4, Total length of the tunnels: 1.5 km Length of earth work: 15.0 km About 640 Billion JPY April 10, 1988: - Highway between Hayashima IC and Sakaide IC is put in service. Fully-access-controlled highway - Number of lanes: four - Restricted speed: ---80 km/hour (between Kojima IC and Sakaide IC) ---100 km/hour (between Hayashima IC and Kojima IC) Seto-Chuo Expressway connects with Sanyo Expressway at Hayashima IC and with Takamatsu Expressway at Sakaide IC. |
 | Shimotsui-Seto Bridge Suspension bridge (Total length: 1,400 m, Center span: 940 m) |
 | Hitsuishijima Bridge Cable stayed bridge (Total length: 790 m, Center span: 420 m) |
 | Iwakurojima Bridge Cable stayed bridge (Total length: 790 m, Center span: 420 m) |
 | Yoshima Bridge Truss bridge (Total length: 850 m, Maximum span: 245 m) |
 | Kita Bisan-Seto Bridge Suspension bridge (Total length: 1,538 m, Center span: 990 m) |
 | Minami Bisan-Seto Bridge Suspension bridge (Total length: 1,648 m, Center span: 1,100 m) |
