Hi, I try to understand the implementation of the code that creates the road net work. In 2009 Mark Burton implemented a feature using tags like mkgmap:road-speed in the points file. See http://www.mkgmap.org.uk/pipermail/mkgmap-dev/2009q4/004777.html Before that Mark also added a feature to handle points with an access tags like "access", "barrier", or "highway". I think the code for these features is not correct, it sometimes splits roads into short arcs. Questions: 1) If a road with road_speed=4 has e.g. 10 points (= OSM nodes) , and the 3rd point has tag mkgmap:road-speed=-1 and the 8th point has tag mkgmap:road-speed=+1, what is the expected result? I would assume that the road is split into 3 parts, one containining points 1-3, one the points 3-8, and the last one the points 8-10. The 1st part would use the unchanged road_speed value 4, the 2nd part the the value 3 and the last part the value 5. (if this doesn't introduce any short arcs, else splitting makes no sense for these tags) Correct? 2) If a road with 10 points and access=foot has a 3rd point with barrier=bollard, should this cause a split of the road so that points 3-10 have access=bicycle? I think no. 3) If a road with 10 points and access=bicycle has a 3rd point with barrier=cycle_barrier, should this cause a split of the road (which just seems to increase the img size) ? I think no. Gerd -- View this message in context: http://gis.19327.n5.nabble.com/Questions-regarding-routing-tp5764520.html Sent from the Mkgmap Development mailing list archive at Nabble.com.