[Talk-us] Update on potential highway classification reform

[Brian M. Sperlongano]

> "Undivided and narrow freeways": I'm less convinced that these should stay
> motorway just because they are signed as part of the interstate system. By
> definition these don't meet *all* of the motorway physical
> characteristics and road users *should* expect to go more slowly in these
> constricted locations, so downgrading these to trunk feels more logically
> consistent with the classification scheme for non-interstate highways.
>

That list includes I-93 in Franconia Notch, NH, which drops down to a
two-lane *divided* highway through the narrow mountain pass.  Perhaps we
might say an Interstate that becomes narrow but remains divided,
grade-separated, and limited access (aka a "super two") should stay
motorway and ones that become undivided should get downgraded.  I suspect
this rule might only apply to that specific road, but I think it would be
consistent with the principles we're laying out here.
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