It's already been mentioned that putting cars in the tunnels increases the usefulness of the tunnels quickly without requiring a large network of tunnels right

It's already been mentioned that putting cars in the tunnels increases the usefulness of the tunnels quickly without requiring a large network of tunnels right off the bat. I think it's always possible to convert the tunnels to trains at a later date with a much lower cost than the initial investment. I think having the tunnels be designed for cars makes a lot of sense for Elon in particular because he can design the tunnels as an ideal environment for the first generation of self driving cars. This would give him a good start getting self driving cars on the road.