Re: Long-span Railroad bridges across the Mississippi and other connecting rivers

"Chris Johnson" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]

> Another factor is that highway bridges are generally
> functionally obsolete before they are structurally
> obsolete.  Railroads can add capacity to their system with
> out replacing most of their infrastructure, something
> highways generally can't.  Almost all highway projects are
> to increase capacity, ease congestion, and/or increase
> safety.


Yes, very true!

It's a lot easier for a railroad bridge to triple it's traffic than it is for
a highway bridge to do the same.  So railroads usually don't need to replace
a major bridge as often as a state highway departments need to.