I'm using OSM maps on my Garmin Nuvi and have noticed some strange routing issues that seem to be related to feeder roads on roundabouts. Assuming exit to the North is the assumed best route... If the on/off feeder is created as a single way, highlighted as below, I think the routing algorithm is seeing this as at least inefficient, doubling back, and finding a different route. ![snapshot][1] I can't find any info on this style so would appreciate any opinions. This may be specific to Garmin routing or even routing algorithm used to generate the maps so of little relevance to OSM. [1]: http://help.openstreetmap.org/upfiles/snapshot_1.png

I'm using OSM maps on my Garmin Nuvi and have noticed some strange routing issues that seem to be related to feeder roads on roundabouts. If the on/off feeder is created as a single way, highlighted as below, I think the routing algorithm is seeing this as at least inefficient, doubling back, and finding a different route. ![snapshot][1] I can't find any info on this style so would appreciate any opinions. This may be specific to Garmin routing or even routing algorithm used to generate the maps so of little relevance to OSM. [1]: http://help.openstreetmap.org/upfiles/snapshot_1.png