On 13 Jun 2009, at 08:44, Shaun McDonald wrote: > I just put the traffic lights on the nodes. Life is too short to spend > time grouping them. There is too much Tiger fixup and unnamed, or > completely missing roads to enter. If the junction is large, you'll > probably have a longer than normal waiting time, thus it shouldn't be > a problem if you go through an extra set in the model.
It certainly makes sense to me to add a traffic signal tag to the 'junction' relation. There was a discussion some time ago on this subject which also concluded that there should be provision for a tag for the actual signal head. Personally I would suggest that we add a traffic_signals=yes to the 'junction' relation and create a new point feature tagged 'highway=signal-head' for the actual poles. I guess that someone at some point will ask for 'highway=signal-loop' for indicating where the triggering loop is as well. Finally, is the term 'Intersection' a useful one for complex junctions of this sort to distinguish it from a single T junction or cross-road? The term Junction would always then relate to a single node, and the term Intersection would refer to a relation which combines a number of nodes/ways. The simplest Intersection would be a staggered junction, but spaghetti junction in B'ham would also be an intersection. Regards, Peter > > > Shaun > > On 13 Jun 2009, at 02:27, SteveC wrote: > >> So there are bits and pieces on traffic lights on the wiki >> >> http://wiki.openstreetmap.org/wiki/Relations/Proposed/Traffic_Lights >> http://wiki.openstreetmap.org/wiki/Tag:highway%3Dtraffic_signals >> >> http://wiki.openstreetmap.org/wiki/Talk:Proposed_features/Set_of_Traffic_Signals >> >> but seems to have gone quiet especially on the question of modelling >> traffic lights across big junctions. I'm interested because all the >> lights near me span 4 or more intersecting ways. I'm in the relation >> camp on how we should model that rather than the way joining it all >> up >> with amenity:traffic_signals on it. Anyone interested in taking >> charge? >> >> Best >> >> Steve >> >> _______________________________________________ >> talk mailing list >> [email protected] >> http://lists.openstreetmap.org/listinfo/talk > > > _______________________________________________ > talk mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
