Earlier quoted context omitted.
I imagine it’ll also probably be hell on tires. You’d need W- or Z-rated tires to do that and those are $$. Perhaps smooth concrete will mean lower rolling friction along with lack of sudden maneouvers. Still, going that fast is expensive in all sorts of ways.
And it's best not to think about what happens if a car stops for any reason, or worse, catches fire. I do not believe any escape hatches were part of the demo and cost calculations.
Tunnels looked wide enough to get out and walk thru. They’ll need ventilation and will probably get maint / esc hatches for regs. Dunno about ADA. Didn’t seem like a detail worth hashing out in a debut tho.