[OSRM-talk] Per-Direction Node Restrictions
hofmann at mapbox.com
Wed Oct 5 21:18:15 UTC 2016
I just remembered your issue while looking at road priorities: priority
roads, give way, stop signs:
>From reading your profile pseudo code it should roughly be the same!
I started working on this in
https://github.com/Project-OSRM/osrm-backend/pull/3009 but it won't be a
quick change in the profiles, for sure.
Daniel J H
On Tue, Sep 27, 2016 at 4:29 PM, Spencer Gardner <spencergardner at gmail.com>
> On Tue, Sep 27, 2016 at 5:11 AM, Daniel Hofmann <hofmann at mapbox.com>
>> When you say "should be avoided" you mean completely discarding a way
>> going over a specific node in a single direction?
>> In that case, we support turn restrictions in the form of
>> `fromWay,viaNode,toWay` you could try.
>> As in: `no_turn, fromResidential, viaHighwayNode, toResidential`
>> (Relevant: via-way restrictions: https://github.com/Project-OSR
>> Daniel J H
> I had considered turn restrictions, but I was hoping for something a
> little more generalizable so that I don't have to identify specific nodes
> and ways in the config. For example, I'd like to tell the router to avoid a
> node representing the intersection of a residential way and a primary way
> IF the route is using the residential way. But I'd like to avoid having to
> identify all such instances via turn restrictions.
> I could imagine something like the following pseudo code:
> function crossing_penalty(entering_way, crossing_way, node)
> local entering_highway = way:get_value_by_key("highway")
> local crossing_highway = way:get_value_by_key("highway")
> -- get traffic signals
> local tag = node:get_value_by_key("highway")
> if tag and "traffic_signals" == tag then
> traffic_lights = true
> if entering_highway == "residential" and crossing_highway == "primary"
> and not traffic_lights then:
> crossing_penalty = some_large_number
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