[Talk-in] Why are so many roads tagged with multiple speeds?

[Warin]

On 19/5/22 23:25, Devdatta Tengshe wrote:
> So should I go ahead and update these to the lowest number? (One by 
> one after checking each record manually)
>
>
> (We were running a local instance of Valhalla on an osm extract, and 
> it wasn't giving us the correct route in some cases; Diagnosing that 
> issue led me to such ways which have such incorrect speed values.)


You can run a filter on your local OSM extract data that resolves the 
multiple speeds to the lowest speed.

This leaves the original OSM data intact for others to work on.

>
> Regards,
> Devdatta Tengshe
>
> On Thu, 19 May, 2022, 6:41 pm Chetan H A, <chetanha91 at gmail.com> wrote:
>
>     This could be a tagging mistake.
>
>     Example: /maxspeed=50/ will be assigned to the road based on the
>     signboard
>     <https://kartaview.org/map/@12.427455781439676,76.71715356774553,12z>
>     If there are separate speeds mentioned for different vehicle types
>     <https://wiki.openstreetmap.org/wiki/Key:maxspeed#Vehicles>, then
>     we can tag with /maxspeed:hgv=*/ (high good vehicles like lorry etc.)
>
>     Regards,
>     Chetan
>
>     On Thu, May 19, 2022 at 3:29 PM Devdatta Tengshe
>     <devdatta at tengshe.in> wrote:
>
>         I was using OSM inspector, and found that there are so many
>         roads which are tagged with multiple speeds, such as:
>
>         https://www.openstreetmap.org/way/1018752726
>
>         https://www.openstreetmap.org/way/157746064
>
>         Is there a specific reason so many roads are tagged like this?
>
>         Regards,
>         Devdatta
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