

Well the thing is if they made it a train then they’d have to follow pesky safety regulations like having room in the tunnel for someone to escape an accident and ventilation in case of a fire or other release of toxic fumes.
The point isn’t to make a functional transportation system, it’s a grift to get taxpayer dollars into Musk’s pockets by giving Tesla more places to put cars they can’t sell otherwise.
What is the physics or math behind that? Light from the sun is essentially aligned by the time it reaches earth. If the mirror is perfectly reflective, a 10 m^2 mirror should light up a patch of Earth roughly 10 m^2 times the cosine of the angle of the mirror. So unless the angle is close to 90°, most of the losses would be from poor reflectivity.
I totally agree it’s a stupid idea. But maybe it’s even worse than I am thinking of?