Comment by unityByFreedom

> We could drill more regular roadways - but it's notable that one reason we don't is controlling emissions and safety is difficult with human drivers.

Also cost. Drilling car tunnels is more expensive per passenger served than a mass transit system

> if it's cheap enough to do, hopefully a very scalable one

That's a big unproven if, and a hope that's almost out of a science fiction novel. If Musk has ideas about how to solve those problems, let's hear them.

We already understand that tunnels with electric cars would be great. Everything we do has a cost and if we're going to work together on something as a society, let's do something that benefits more of us than luxury car owners