[Talk-us] US Trunk road tagging

[Evin Fairchild]

Interestingly enough, when looking at the functional class map viewer for
Washington, I found that there are some places where a two lane road
without any interchanges is considered an expressway, for example WA 9
between Snohomish and Arlington.

It seems like this road is considered an expressway simply because there
aren't any driveways onto the road from adjacent properties, and
intersections are kept to a minimum. I've also noticed this for parts of WA
26 and WA 17 in eastern Washington. Has anyone noticed this in other states
or is this just something weird that Washington is doing?


On Thu, May 6, 2021, 11:04 AM Paul Johnson <baloo at ursamundi.org> wrote:

> On Thu, May 6, 2021 at 12:43 PM Kevin Kenny <kevin.b.kenny at gmail.com>
> wrote:
> >
> >
> >
> > On Thu, May 6, 2021, 13:30 Roff, Thomas (FHWA) via Talk-us <
> talk-us at openstreetmap.org> wrote:
> >>
> >> On the point of definition of an Expressway. We usually refer the
> Highway Capacity Manual for their definition. However, I am not sure if
> there is a legal definition in the US.
> >
> >
> > There may be in some states. Around me, 'expressway' and 'freeway' are
> pretty much synonymous, so I actually have no idea what 'expressway=yes'
> might mean.
>
> I feel like Oregon/Washington have the strongest grasp on this, being
> any two lane grade-seperated controlled access road (so, single
> carriageway freeway type situation) or any dual carriageway high speed
> freeway like road with intersections (including at terminus).
>
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