[Tagging] Setting a preferred routing

[Kevin Kenny]

On Sun, Sep 17, 2017 at 7:10 PM, Dave Swarthout <daveswarthout at gmail.com>
wrote:

> I came across an interesting routing problem the other day. A section of
> the Richardson Highway in Alaska was relocated in 2015 by the Alaska DOT in
> anticipation of erosion or flooding by the nearby Delta River. However, the
> old highway is still present, is still paved, and is shorter than the new
> highway that replaced it. OSM mapper Will Lenz classified the old highway
> as a track to "persuade" his GPS's routing algorithm into using the new
> section. See the following changeset and the conversation I had with Will
> here: http://www.openstreetmap.org/changeset/47049836.
>
> Clearly, the old highway is not a track using the Wiki's definition. I
> might be tempted to tag it as highway=unclassified, or perhaps service, but
> none of these solutions is ideal. Will's idea works but is not, strictly
> speaking, proper.
>

It rather depends on why a router should avoid it. Is it posted 'no thru
traffic' while still being the only route to somewhere? (In which case
'access=destination' might cover it.)
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