[OSRM-talk] U-turn penalty?

[Xavier Prudent]

Hello Daniel,

Thank you for this fast answer. Is that then possible to forbid left turns?

Our group may then want to implement this uturn restriction, are there
still active developers on osrm?

Regards,
Xavier

Le lun. 23 avr. 2018 à 18:27, Daniel Patterson <daniel at mapbox.com> a écrit :

> Hi Xavier,
>
>   This u-turn penalty only applies to what you might call "direct u-turns"
> - those that occur on a single line feature, like at the end of a
> cul-de-sac.
>
>   Unfortunately, for u-turns between divided roads, this penalty value
> isn't applied - OSRM treats those as two consecutive left turns (or right
> turns, depending on your country).
>
>   There's an open ticket about this problem:
> https://github.com/Project-OSRM/osrm-backend/issues/4368, but nobody has
> really looked into fixing it yet.
>
> daniel
>
> On Mon, Apr 23, 2018 at 3:17 PM, Xavier Prudent <prudentxavier at gmail.com>
> wrote:
>
>> Hello,
>>
>> I want to forbid u-turns during the routing.
>> I hence played with the u_turn_penalty parameter in profiles/car.lua
>>
>>       u_turn_penalty                 = 20,
>>
>> then reconstructed the osrm objects using osrm-extract and osrm-contract.
>> I tried values 0, 20, 240 and 1000. The routing clearly changed, but I
>> keep on getting u-turns. For higher parameters I even get more u-turns.
>>
>> My understanding was that the higher the parameter, the less u-turn one
>> should have.
>>
>> Did I understand correctly? How can I forbid u-turn then?
>>
>> Regards,
>>
>> Xavier
>>
>> --
>>
>> *Xavier Prudent *
>>
>> *Data Scientist  - Data Mining - Machine Learning*
>>
>> Web    :* www.xavierprudent.com <http://www.xavierprudent.com>*
>> Tel (Québec)      : (514) 668 76 46
>> Skype : xavierprudent
>>
>>
>>
>> _______________________________________________
>> OSRM-talk mailing list
>> OSRM-talk at openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/osrm-talk
>>
>>
> _______________________________________________
> OSRM-talk mailing list
> OSRM-talk at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/osrm-talk
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/osrm-talk/attachments/20180424/75f06b0c/attachment.html>