2012/4/11 Ross Scanlon <i...@4x4falcon.com>: >>> No. The router should know not to do this. Likewise as below the router >>> should not make u turns at traffic lights. >> >> >> Based on what? How does the router know that the two ways are two >> carriageways of a single road? Couldn't they be a straight road, that >> becomes a oneway street at a certain point, and at that point a >> junction brings to a oneway secondary road? > > > The name of the way, the fact that you are turning > 180 degrees on the same > way.
I don't agree. First, if you're on the same way, you're not turning, but going straight and following the road. In the case of the OP, I expect to see three ways, two of which tagged oneway=yes. Second, if you turn more than 180 degrees, you're hopefully going on a bridge ;-) Third, think of a situation like this: http://osm.org/go/0CKuMhs89- Suppose that the tertiary has to be split at the junction for any reason (a relation needs only a part of it, or the surface changes, or the incline changes, whatever). Also suppose that the tertiary is oneway=yes. You would end up with two ways with the same name, both oneway=yes, with an acute angle between them and a third way exiting from the junction. Would you, as a router, ban the prosecution on the tertiary? Regards, Simone _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging