[talk-au] Routing problem near Albany, WA

[forster at ozonline.com.au]

Hi

I am satisfied that it is a cache issue. The ways have not been edited  
for 3  days and bicycle (graphhopper) which was doing the little zig  
zag yesterday is now routing correctly.

I think just wait and let the data catch up.

Tony

> Ben, thanks for the suggestions - I'll give them a go.
>
> Ian
>>
>> The intersection in question is quite new, so I am not surprised that
> there are
>> cache issues as you guys have identified. Each routing engine will ingest
> new
>> OSM data on its own schedule.
>>
>> One thing that I noticed with the spurious "at the fork, turn right onto
> Albany
>> Hwy" instructions in the original OSMR link
>> <https://www.openstreetmap.org/directions?engine=fossgis_osrm_car&rout
>> e=-34.9226%2C117.7915%3B-34.9670%2C117.8239#map=16/-
>> 34.9652/117.8223>,
>> is the lack of `_link` roads. I would expect the on- and off-ramps to be
> tagged
>> as `highway=trunk_link`. I suspect the routing engines are expecting the
> same,
>> and therefore seeing the Menang Dr slip road
>> <https://www.openstreetmap.org/way/1077469017> as a legitimate fork in
>> the highway.
>>
>> The latest incorrect directions with "turn sharp left" are probably the
> result of
>> missing turn restriction relations
>> <https://wiki.openstreetmap.org/wiki/Relation:restriction>. I would expect
>> some "no_u_turn" restrictions where slip roads join the two-way hwy way.
>> For example, https://www.openstreetmap.org/way/1077469012. Some
>> routing engines will infer this from the angle of the ways, but not all of
> them.
>>
>> Cheers,
>> Ben
>>
>
>
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