Gosmore now supports basic turn restrictions. When there is only one member in the 'via' role namely the node. no_left_turn is interpreted to mean a turn of more than 45 degrees, but less than 135 degrees to the left. Similar assumptions are used for all the other directions. Furthermore, no_left_turn is most of the time the same as only_right_turn.
Gosmore does not try to make a u-turn at each node, back into the same way. So I've done a test where a restriction forced it to left when it wanted to go right, and it then needed to make an elaborate journey just to turn the car around. In practice, turn restrictions only occur where there are nearby alternatives. It may take some time for Lambertus to update his site, so I can't give you a web demo yet. _______________________________________________ Routing mailing list [email protected] http://lists.openstreetmap.org/listinfo/routing
