Building tunnels in California and LA is great and all. But I'd like to see him do it in Houston, honestly, where common knowledge (cough) says that you can't dig deep in Houston because it's a swamp.
Houston has, arguably, worse traffic than LA
Houston has, arguably, worse traffic than LA
That just means you need to dig deeper!
Houston had a working public mass transport system, but big automotive pressure/corruption destroyed it. That's why Houston is unique. The mayor is elected every two years, because corruption is so rampant.
The now widest highway worldwide, the I10 to Katy once had a railroad track in the middle. They even had a star system and park & ride before WW2.
> Houston is too big
Sounds like a job for Musk, to be quite honest. He's pretty good at driving down costs.
> corruption
Now there's a statement I can, sadly, agree with. :(
Bring it to X; after you figure out how to deal with the super cool and unique geographical features of X!