On 13 November 2013 09:20, Robert Whittaker (OSM lists) <robert.whittaker+...@gmail.com> wrote: > Secondly, you mention the case of special types of bicycle eg > tricycles. I would argue that if such vehicles routinely have a > different legal status with respect to access rights in a particular > country, then they should be given a more specific access tag key to > over-ride any access tags set for bicycle. This is how we handle other > access issues where certain types of vehicle are an exception. (For > example, on a service road only open to buses and taxis, we would set > vehicle=no, psv=yes. Here we should use something like bicycle=no, > <special-type-of-bicycle>=yes.) > > Finally, I think that it is not a good idea to introduce an access tag > value where the precise effect is going to vary by country and have > different meanings to different people. IMO the access tags should be > used to express absolute states as well as possible, rather than being > subject to different interpretations in different places. Routers etc > shouldn't need to know about different national laws and conventions > to interpret the main tag. (This is why, for example, we tag national > speed limits with a numerical maxspeed=* tag, and then provide a > supplementary maxspeed:type=* tag to explain how that numerical value > is derived. Or why in the UK, we tag access rights such as foot=yes in > addition to the legal origin of those rights e.g. > designation=public_footpath.)
I'm not sure though if this is the best approach in the long run. In the Netherlands, segways, rollerblades, and skateboards are allowed on bike paths. In Austria, segways and rollerblades are allowed on bike paths, but skateboards are not. In Germany, segways are allowed on bike paths, but rollerblades and skateboards are not. Do we really want to tag every German path where there is a bicycle sign with segway=yes, rollerblade=no, skateboard=no? And possible a much longer list of vehicles that are treated as pedestrians under one legislation but as bikes somewhere else? Also, if the law changes, for example to include or exclude Segways, we would need to change all tags, even though nothing has changed on the ground. In the long run, I think it would be good if routers will be aware of the jurisdiction a road is in, and then derive the implications of a bike=no sign for other types of vehicles. -- Matthijs _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
