[Talk-us] Trunk

Paul Johnson baloo at ursamundi.org
Sun Oct 8 18:29:26 UTC 2017

On Sun, Oct 8, 2017 at 1:25 AM, Shawn K. Quinn <skquinn at rushpost.com> wrote:

> On 10/05/2017 05:30 PM, Martijn van Exel wrote:
> > Question for you all:
> >
> > What make Michigan state routes 5 and 10[1] trunks rather than
> primaries?
> >
> > To my mind these are highway=primary mainly because of at-grade
> > intersections.. I am still confused about what makes a trunk road in the
> > US. To my mind it's roads with no at-grade intersections but not built
> > to interstate standards / not having an interstate designation... I'm
> > not looking to open up a can of worms but I would really like to
> understand.
> On a related note, I recently downgraded Allen Parkway in Houston from
> trunk to primary, based on the somewhat recent reconfiguration, adding
> traffic signals and lowering the speed limit (which I removed without
> adding a replacement, knowing only that it's no longer 40 mph but I
> forgot if they made it 35 mph or 30 mph). It's possible the western part
> (closer to where it changes names to Kirby Drive) may still technically
> qualify as trunk, but it is kind of an edge case even then.
> Thoughts?

Looks fair to me, I could see the argument going either direction on that
one, falling into a similar situation to Tulsa's Riverside Parkway (which
could a small trunk being a cancelled freeway or a large primary; I'm
legitimately on the fence on that one myself).
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