On 10 September 2015 13:20:43 GMT+01:00, Joachim <nore...@freedom-x.de> wrote: >Proposal: >Define on the wiki page of highway=motorway_link that oneway=* must >also be tagged for every motorway_link.
Sounds fair. > If not tagged, the oneway=* >status of this way is undefined. You wont gain anything by de-defining the "oneway=no" default value. Consumers (routers, renderers, whatever) will not be swayed by a wiki page. They might look at stats and decide themselves what the absence of a oneway tag means, but a wiki proposal is never going to influence that decision. >- For routing purposes it is recommended to not route over ways with >undefined oneway since any assumption may be wrong and it would be >best to correct the data. That's a very bad idea. Routers implementing it would skip a motorway exit (and lenghten the trip greatly) because of a missing tag. I'd much rather get to the exchange, see that the router is suggesting a link i cannot take, and drive around to find a nearby link I can use. Still frustrating but less time wasted. >- In map editors undefined oneway should be displayed as tagging error. And *that* is the actually usefull thing to do, instead of the proposal. File a bug to the major editors and QA tools suggesting to flag motorway links without a oneway tag as an warning. Even better: if the software has the means to do it, flag that warning for any object having tag foo but not tag bar, if 95% of foo tags in the db are accompanied by a bar tag. -- Vincent Dp _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
