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Falldog t1_j2ebo39 wrote

Reply to comment by dudesbeindudes in Driver hits 2 women near White House, killing 1 by MrSpontaneous

> expensive as hell

That's understatement. You'd need electronic and/or hydraulic infrastructure at every intersection. It would have to be powerful enough to raise and lower quickly and durable enough to operate thousands of times a day. Then you need the ongoing expense of continued maintenance or they end up like Metro's escalators.

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new_account-who-dis t1_j2ekq2f wrote

cheaper to just build a bridge or tunnel across every intersection at that point lol

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