assertEquals(-laneWidth, roadMapping.laneOffset(Lanes.LANE1), delta);
assertEquals(0.0, roadMapping.laneOffset(Lanes.LANE2), delta);
assertEquals(+laneWidth, roadMapping.laneOffset(Lanes.LANE3), delta);
roadMapping = new RoadMappingConcrete(5);
assertEquals(0.0, roadMapping.laneOffset(Lanes.NONE), delta);
assertEquals(-2 * laneWidth, roadMapping.laneOffset(Lanes.LANE1), delta);
assertEquals(-laneWidth, roadMapping.laneOffset(Lanes.LANE2), delta);
assertEquals(0.0, roadMapping.laneOffset(Lanes.LANE3), delta);
assertEquals(laneWidth, roadMapping.laneOffset(Lanes.LANE4), delta);
assertEquals(2 * laneWidth, roadMapping.laneOffset(Lanes.LANE5), delta);