Some things should be self-evidently dumb, and there are so many dumb things about
Elon's Tesla tunnel, but one is that if you you have a tiny tunnel (and early Tube tunnels are actually smaller than Elon's), it'll work just fine if you have something on a fixed track, but expecting human drivers to navigate a tiny tunnel at 35 MPH for 8 hour shifts without regular (if minor) incidents is not reasonable.
Those cars are going to be bashing up against the walls regularly.
But, Atrios, these are self-driving Teslas! Surely they can self-drive their way through a .8 mile tunnel.
Surely. Wonder why that isn't happening.