What is the ratio of empty space between trains on a subway? I guess you conveniently forgot that because you were swept away by righteous moralization
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What's the ratio of empty space between cars on a highway? Doing some math (2000 car/hr * 4.8m/car / 100 km/h), it comes out to empty space taking up about 90% of a highway at (throughput) capacity. Running the same numbers on NYC subway trains, a track at capacity would be about 85% empty.
So subways on average, use more of their space than highways do.
And you’re omitting speed from your throughout calculations: 200kph in town and 1000kph between towns.
Look I love subways and have lived in Manhattan and Tokyo. But subways are weak sauce compared to The Boring Company’s tunnels
The legal rule for safety reasons is that vehicles, whether cars or trains, must remain far enough apart to be able to safely come to a complete stop before hitting the car in front of it if that car were to come to an abrupt halt. Thus, capacity actually goes down at higher speeds, and space utilization would go down as well.