Seishō Bypass
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| 西湘バイパス | |
| Route information | |
| Length: | 14.5 km 1.8 km (Ishibashi Branch Route) (9.0 mi) Main Route |
| Existed: | 1967 – present |
| Major junctions | |
| From: |
Seishō-Ninomiya Interchange in Ninomiya, Kanagawa  Seishō Bypass (toll-free section) National Route 1
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| To: |
Hakoneguchi Interchange in Odawara, Kanagawa Odawara-Hakone Road National Route 1 Ishibashi Interchange in Odawara, Kanagawa  National Route 135
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| Highway system | |
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National highways of Japan Expressways of Japan |
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The Seishō Bypass (西湘バイパス Seishō Baipasu?) (lit. West Shōnan Bypass) is a toll road in Kanagawa Prefecture, Japan. It is owned and managed by Central Nippon Expressway Company.
Officially the road is designated as a bypass for National Route 1. It is also classified as a road for motor vehicles only (自動車専用道路 Jidōsha Senyō Dōro?) and access is controlled with interchanges and junctions in a similar manner to national expressways in Japan.
The road closely follows the coastline of Sagami Bay, facilitating access between the Tokyo urban area and the city of Odawara in western Kanagawa Prefecture. At the eastern terminus the Seishō Bypass continues as a toll-free road managed by the Ministry of Land, Infrastructure and Transport. In the west, the main route terminates near the resort town of Hakone, while a short branch route terminates at an intersection with National Route 135 which leads to the resort town of Atami and the Izu Peninsula.
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Wikipedia