I wrote: > So bizarrely, if I set up mkgmap so that the highway=unclassified and > surface=unpaved combination means a speed of 70 km/h then the simulation > is done at 70 km/h. Done in the mkgmap "lines" style file like this: highway=unclassified & surface=unpaved [0x06 road_class=0 road_speed=3 resolution 21] John