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this is decidely a feature and not a bug. CBTC systems work by continually updating track leases to the last known position. this allows for high throughput while safely avoiding collisions in case of catastrophe.

highway separation is unacceptable for anything other than trams (which are slow and have track brakes). the path to safely increasing throughput is to increase braking performance and minimize dwell time. existing systems eg paris line 14 and the tokaido shinkansen have very high throughput.

transit projects would look even better compared to highways if they had to be safe too!



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