Thanks for the tip about the "change" tag.
So here is what I've done - does it sound right? - in the section where the slip lane joins the 2-lane through road (where lanes=3), I have added: "change:lanes=not_right|not_left| " (this hopefully means that the left hand lane cannot change lanes to the right, and the middle lane cannot change lanes to the left) - then in the next section where turn left and right slip lanes are added (where lanes=5), I have added" "change:lanes= |not_right|not_left|| " (which hopefully means: the left slip lane can do as it pleases, the 2nd lane (the left-most of the 3 through lanes) cannot change right, the middle of the 3 through lanes cannot change left, and the other 2 right-most lanes can do as they please) I'd be very interested to see what a routing engine does at the point where the slip lane joins the 2 through lanes. That is, does it associate the slip lane with the left-most of the through lanes and hence know a vehicle can't jump from the slip lane to the centre lane at the instant - or do the lanes go into a "melting pot" with no association? Similarly where lanes=3 changes to lanes=5 where the turn left and right slip lanes are added. Ian
_______________________________________________ Talk-au mailing list Talk-au@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-au
