On: Elon Musk is boring a tunnel to skirt gridlock

[mrfusion]

I wonder if maintenance would be cheaper. Think about it. A constant temperature. No rain or sun. No freeze thaw cycle. No salt.

Those are all things that damage roads.

[jartelt → mrfusion]

Perhaps, but in a tunnel you have to deal with preventing water leaks and pumping out ground water, maintaining ventilation systems, lighting, etc. Plus fixing things like potholes will be more costly in a tunnel.