@Test
public final void testRoadLength() {

    final int laneCount = 1;
    RoadSegment r = new RoadSegment(1000.0, laneCount);
    assertEquals(1000.0, r.roadLength(), delta);
    r = new RoadSegment(1234.5, laneCount);
    assertEquals(1234.5, r.roadLength(), delta);
}