route_mode = 0 : auto
route_mode = 1 : onroad
route_mode = 2 : creates an 'offroad' route, or one segment between pos. and dest.
route_mode = 3 : experimental shortest onroad route
below is for the penalty - system
maxspeed_handling :
0 = always, means replace route_weight with maxspeed, in vanilla routing.
in the penalty system : speed_used is weighted speed or weighted maxspeed if avalable in OSM
penalized speed = (maxspeed or speed) * (route_weight / 100) * (roundabout_weight / 100)
route_weight and roundabout_weight are not mandatory, so no need to insert a '100' value
to leave some speed untouched.
1 = only when it limits speed and follows the same wieghting as above
2 = never