def addNewLane(self, width, lanemarking_right=None, lanemarking_left=None):
lane = Lane()
lane.parent = self
lane.width = width
if lanemarking_left is not None:
lane.lanemarking_left = lanemarking_left
if lanemarking_right is not None:
lane.lanemarking_right = lanemarking_right
lane.id = self.getNextId()
self.lanes.append(lane)
