Most tools follow the rule described here: http://wiki.openstreetmap.org/wiki/Relation:restriction <http://wiki.openstreetmap.org/wiki/Relation:restriction>
"If the first word is "no_", then no routing is possible from the "from" to the "to" member. If it is "only_", then you know that the only routing originating from the "from" member leads to the "to" member. This distinction is also shown in the examples section <http://wiki.openstreetmap.org/wiki/Relation:restriction#Examples> of this page.” So OSRM is correct in this case. If you want to make up a new restriction relation type, it’s better to use new tags. for example: type=restriction:on_red restriction:on_red=no_right_turn Thanks, Bryan > On Jul 2, 2016, at 10:55 AM, Nathan Wessel <nate.wes...@mail.utoronto.ca> > wrote: > > Hi all, > I've been running into some trouble with the following tag recently. > > 'restriction'='no_right_turn_on_red' > <https://taginfo.openstreetmap.org/tags/restriction=no_right_turn_on_red> > mapped as a turn restriction relation. > > My problem is that OSRM treats it as a no_right_turn restriction, though > obviously it should not prevent all turning. The wiki indicates that this is > the expected behaviour though; it seems that anything beginning with 'no_' > means no turn is permitted from the 'from' way to the 'to' way. I brought > this up on the restriction talk page here > <http://wiki.openstreetmap.org/wiki/Talk:Relation:restriction#No_Turn_On_Red> > and a couple people implied that this was definitely not the right tag, if > restriction is even the right key. I then brought the topic up for discussion > on talk-ca (about half of all occurrences of this tag are in Toronto and > Ottawa, where I'm having my particular routing issues), and the people on > that list were pretty adamant that the tag was useful and made sense as is. > One person suggested this should be reported as a bug > <https://lists.openstreetmap.org/pipermail/talk-ca/2016-June/007015.html> for > OSRM. > > Who is right here? Should I report this as a bug and change the wiki to allow > turns on "^no_.*" relations as standard or should the tagging be changed? And > how? >
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