I wouldn't get in a tunnel like that in an earth quake zone like California if you paid me -- I don't see any emergency exits... Scary.
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Tunnel for your car good job America
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It wont work with current fire requlations, it requires 2mins of escape time from confirmation of fire and to the place of safety... Tunnel is easy to build but it always has a human side that will eventually use the public systems... Similar to his hyoerloop idea...
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