[Talk-us] Interstate Highways Relations List

[Joseph Jon Booker]

On Sun, 12 Apr 2009 08:31:14 -0400
Greg Troxel <gdt at ir.bbn.com> wrote:
> I don't understand what the "auxiliary list" is about.  Interstates
> are interstates even if they are only in one state.  E.g. I-190 in
> Massachusetts.

See http://en.wikipedia.org/wiki/US_41#Alternate_routes . I've never
seen them either, but I suppose a road can be marked as offically an
alternative along another route.

-- 
Joseph Booker
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