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Positive_Debate7048 t1_iy7vx6h wrote

Reply to comment by bubandbob in Is there really no way to walk from JC to Manhattan? by XIFOD1M

Air inside the tunnels isn’t that bad unless there is lots of traffic, they have very good ventilation systems. They can totally refresh the air inside the tunnel every 90 seconds, they were designed to keep tunnel goers safe from car exhaust before catalytic converters were invented. At the time the tunnel was built vehicle exhaust was substantially more dangerous.

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ScumbagMacbeth t1_iy9ng47 wrote

I did a "fun run" years ago that went through the tunnel. It was closed to traffic only about an hour before we were scheduled to go through. It wasn't smoggy or smelly at all, the ventilation system is remarkable.

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