By far the most expensive maintenance of underground
utilities is in Manhattan, due to underground congestion.

It's a U-shaped curve where moderate density is the sweet
spot.

=v= That certainly makes sense.

Sunny Ladd's study found this for overall taxes too.

=v= So we're all in agreement then: moderate density. Not
Manhattan, not suburban sprawl.

=v= In other words, precisely what New Urbanism/Smart Growth
is advocating.
_Jym_