Elon Musk's "Loop" is a dumb idea and someone other than Thunderf00t needs to point this out.
Video highlights two unavoidable flaws, even if you think everything else is going to work out fine:
1) Your car is guided along tunnels at 150 mph. This will induce wear and tear on your wheels. You're going to have to fork over money to keep those wheels in good condition just to use these tunnels even before you factor in any other expenses like fees, etc. The record lap for Formula One racing is 160mph. Your car will be expected to travel a bit below that over multiple miles.
2) In the event of an accident, like a guide breaking down, it will create a catastrophic death trap for about everyone in a specific tunnel because there isn't nearly enough time to break (due to the aforementioned 150 mph travel time).
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