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Re: FW: Redux; Best Transit in Medium Throughput - Low Clearance AND Shared ROW

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  • paulparma
    ... Rail doesn t allow other vehicles (non-tracked) on the road, does it? Catenary systems need much more overhead clearance don t they? And buses are not as
    Message 1 of 2 , Aug 7, 2002
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      --- In carfree_cities@y..., Paul Parma <info@v...> wrote:
      > So what passenger transport system can meet these criteria? Third
      Rail doesn't allow other vehicles (non-tracked) on the road, does it?
      Catenary systems need much more overhead clearance don't they? And
      buses are not as desirable to passengers, are more costly in the long
      run and can't meet the worst case throughput requirements can they?
      >
      Apparently Conduit ploughs the best, non-bus option.

      http://www.magma.ca/~dewi/trains/conduit/conduit.html

      and

      http://www.nycsubway.org/us/tracks/conduit-cross.html

      are of London and New York systems respectively. Apparently Washington
      DC was the only other similar system in the US. Looks like the
      London and
      New York systems were phased
      out in the late 40s and early fifties. Saw a note somewhere that the
      systems
      hadn't changed since the turn of the century (1900). Maybe that
      means the
      system was robust! I could only hope. Would be real cautious of any
      cute
      ideas engineers had to improve on the subgrade support system, though
      I
      would hope something less expepensive than the deeply set, large cast
      iron
      supports
      would be workable.

      Does anyone know of any more conduit systems, especially more recent
      than
      1950?

      What of installation costs? Available professional expertise?

      Paul Parma
      Austin, TX
      info@...
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