On Sun, Mar 23, 2014 at 09:52:53AM +0100, Gerd Petermann wrote:
I am not sure how I should interpret a restriction relation with restriction=only_* and a via way. AFAIK the Garmin format doesn't have such kind of restriction, so we have to translate it into one or more no_* restrictions for the other possible ways. This was rather easy for restrictions with a via node, but how should I do it for via ways? Examples: http://www.openstreetmap.org/relation/67571
This looks like a mapping error (should simply use a 'via' node).
This one is more tricky. The note on the relation says that there is a lane marking that you cannot cross when turning right from the parking lot. So, you can only continue straight to Mäkelänkatu and not take an immediate left turn to Vääksyntie. It seems that also this one could be corrected in the map data by branching the Vääksyntie exit before the parking lot driveway. In that case, there would be no need for a turn restriction. The real trouble (AFAICT) is no_u_turn with role=via ways. That cannot be fixed by manually simplifying the map data. Marko