On Mon, 2017-06-12 at 08:58 +0000, Harry Wood wrote: > I came across a few tagging quirks to do with bus access and > specifically "service=bus" > > First of all there's some roads with service=Bus (uppercase B). So > that's definitely a mistake. > Only exists in a cluster in Manchester ...plus a small cluster in Sao > Paulo!: > https://overpass-turbo.eu/?w=%22service%22%3D%22Bus%22+global&R > > The idea of the service=bus tag is to allow a bus routing system to > know that a service road is for buses, with the implication that all > other service roads should be not for buses. That was a surprise to > me. When I configured a bus routing system (doing this as part of my > day job at TransportAPI), it didn't occur to me to disallow buses > driving down service roads, but maybe I should rethink that. > > In any case it seems to me that the access tagging should be regarded > as orthogonal to this. What I mean is, while we might tag a road as > service=bus, we should also make sure that all these special roads > for buses ...allow buses! If they're access=no, then we need to also > make sure they are bus=yes (or psv=yes). Sounds reasonable? > > So I came up with this Overpass query to try to find those problems h > ttp://overpass-turbo.eu/s/pDR Not too many. > > Should we go ahead and fix those things? Quite a small job. I can do > it myself actually. > > > There are many other problems (bigger problems!) we could fix with > bus data in the UK. For example an extension of this idea would be to > check for access tagging on all ways which are part of bus route > relations. And of course there's coverage of the bus route relations > themselves. That's something we were discussing here as a possible UK > quarterly mapping project: https://www.loomio.org/d/uBc7x1Ok/quarterl > y-project-july-sept2017 > Harry Also don't forget the psv=* tag too, I suspect this should be more common in the UK as it limits access to buses on public service and most are also open to hackneys·
Phil (trigpoint) _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
