Japan talks again to build second tunnel under Tsugaru Strait. The existing Seikan tunnel is world's longest underwater tunnel. But it is only for rail. The new tunnel will cater cars and trucks.
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://www.therichest.com/rich-powerful/inside-tsugaru-strait-tunnel-the-7-billion-construction-project-in-japan/
Inside Tsugaru Strait Tunnel: The $7 Billion Construction Project In Japan
www.therichest.comThe whole construction of Tsugaru Strait Tunnel is set to cost approximately $7 billion.