[klyrs]

It's there until the next big earthquake, anyway. Which would probably be more or less okay with garbage, but terrifying for the combination of gas & electric

[surfpel]

Tunnels can actually be one of the safest places during an earthquake, so long as its well built and doesn’t pass through a fault line.

[c22]

Also keeping these things "maintained" often involves digging up the whole road every few years.

[ant6n]

Not if there`s a maintenance shaft running along various tubes. In any case, solutions like this are only viable in relatively dense, urban areas. That would be a difficult prerequisite for many, even if it makes a lot of sense.

[growlist]

Some areas are pretty much unaffected by earthquakes, like the UK.