How could I take part in the talk? > 在 2019年12月23日，下午8:01，osrm-talk-requ...@openstreetmap.org 写道： > > Send OSRM-talk mailing list submissions to > osrm-talk@openstreetmap.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.openstreetmap.org/listinfo/osrm-talk > or, via email, send a message with subject or body 'help' to > osrm-talk-requ...@openstreetmap.org > > You can reach the person managing the list at > osrm-talk-ow...@openstreetmap.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of OSRM-talk digest..." > > > Today's Topics: > > 1. Bicycle routing, crossing large roads: how to get information > on the roads crossed (Jeroen Hoek) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 22 Dec 2019 19:01:59 +0100 > From: Jeroen Hoek <m...@jeroenhoek.nl> > To: osrm-talk@openstreetmap.org > Subject: [OSRM-talk] Bicycle routing, crossing large roads: how to get > information on the roads crossed > Message-ID: <0f2fa4b0-8d2c-19fe-58e3-a3017fd62...@jeroenhoek.nl> > Content-Type: text/plain; charset=utf-8 > > Hello, > > I am looking into a bicycle routing problem and need some help on how to > access certain information from within the bicycle profile. > > The routing problem may be summarized as follows. Two routes are > available; one of these crosses a large road (say, highway=primary), > with an uncontrolled and unmarked crossing; the other is slightly > longer, and crosses no roads at all, instead passing under the same road > via a tunnel. > > The second route should be preferred if the detour is fairly brief. That > is, in routing terms the level crossing should be penalized in certain > cases, such as crossing higher priority roads (i.e., secondary and > upwards), and additionally, penalized for having unmarked or > uncontrolled crossings. The number of lanes may further penalize this route. > > This would let the bicycle profile prefer safer routes if reasonable in > terms of delay incurred. It could apply to the foot profile as well. > > Example with the undesirable, but legal crossing: > > https://www.openstreetmap.org/directions?engine=fossgis_osrm_bike&route=53.20425%2C5.77589%3B53.20565%2C5.77266#map=19/53.20525/5.77427&layers=N > > The preferred route would start like this: > > https://www.openstreetmap.org/directions?engine=fossgis_osrm_bike&route=53.20425%2C5.77589%3B53.20528%2C5.77433#map=19/53.20506/5.77455&layers=N > > Looking at the API provided I can see that I can get at the crossing-tag > (if any) in process_node, but it looks like the information I need to > conclude that a route crosses a large road is not available. The > process_turn method has it, but that method seems to be only called when > the a node marks a point where permissible routes branch. > > However, in my sample case there is no branching for the bicycle route: > the highway=primary being crossed does not allow bicycles, so at the > crossings with this road there are no alternative paths, and thus > process_turn is not called at that node. > > Is there another way to find out what type of road(s) I am crossing? > > Kind regards, > > Jeroen Hoek > (GitHub: jdhoek, OpenStreetMap: JeroenHoek) > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > OSRM-talk mailing list > OSRM-talk@openstreetmap.org > https://lists.openstreetmap.org/listinfo/osrm-talk > > > ------------------------------ > > End of OSRM-talk Digest, Vol 82, Issue 4 > ****************************************
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