"Doug Miller" wrote in message
m...

I don't see much reason why rail lines couldn't be run down the medians of
existing interstates, similarly to the commuter rail service in and out of
Chicago. And there are plenty of *existing* rail lines on *existing*
rights of way that could be upgraded, doubtless at less expense than
leasing
*new* rights of way and constructing new lines.

Did you ever notice what _else_ is in those medians at most underpasses?
Concrete pillars....

Problem with the "upgrade" is sort of like trying to fix your power plant.
You go whole hog to the new requirements or nothing. The crossings would
all have to change.