A Turn leads from the end of one Lane to the start of another. (Except for pedestrians; sidewalks are bidirectional.)
Penalties for (lane types, lane-changing, slow lane). The penalty may depend on the vehicle performing the turn. Lower means preferable.
Is this turn legal, according to turn lane tagging?
Is this turn legal, according to turn restrictions defined between road segments?
If this turn is a crosswalk over a single road, return that road and which end of the road is crossed.
Only appropriat for pedestrian crossings. The geometry of crosswalks will first cross part of a sidewalk corner, then actually enter the road. Extract the piece that’s in the road.
Returns the argument unchanged.