Won’t new tunnels just fill up with traffic too?

“So a key rebuttal to the tunnels is that if you add one layer of tunnels then that will simply alleviate congestion, it will get used up and then you’ll be back where you started, back with congestion. But you can go to any arbitrary number of tunnels any number of levels. The deepest mines are much deeper than the tallest buildings are tall…”

— Elon Musk, 28 April 2017 · Watch: TED video (2:46) ↗