Kobotoke Tunnel, Railway and road tunnels at Tokyo-Kanagawa border, Japan
Kobotoke Tunnel is a double passage carrying both rail and road traffic through the mountains between Tokyo and Kanagawa Prefecture. The two separate tubes allow trains and vehicles to pass through simultaneously, serving as a major transport link in the region.
The tunnel opened in 1901 and marked a major breakthrough in connecting the two prefectures by transport. The project represented an important milestone in Japan's infrastructure development during the early 20th century.
The tunnel forms part of the Chūō Main Line railway system, connecting communities and facilitating the movement of people between Tokyo and surrounding regions.
The tunnel sits along the Chuo Main Line and is accessible through train travel between the regions. Visitors can view the route from outside, but the interior passages are not open to public access.
The tunnel system was engineered to allow both types of traffic to operate simultaneously without interfering with each other. This solution reflects the engineering creativity of early Japanese infrastructure planning.
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