道路的平面线形力求平顺，转折不要过多过急。否则，路线走向曲折，往往限制

道路的平面线形力求平顺，转折不要过多过急。否则，路线走向曲折，往往限制人的视野，影响行车所必须保持的视距，使司机操纵困难，行车不稳定。设计时，可以在曲线中间处，插入足够长的直线和，回旋线。

結果 (英文) 1:

Horizontal alignment of the road to ride, turning too much too fast. Otherwise, the route to the twists and turns, often restrict people's vision, affecting sight distance that must be maintained by the road, the driver manoeuvring with difficulty, traffic is not stable. At design time, you can in the middle of the curve, insert a line long enough and, swing line.

結果 (英文) 2:

Horizontal Alignment seeks to smooth the road, do not turn too much too fast. Otherwise, the route to twists and turns, often limit people's vision, the impact of traffic necessary to maintain line of sight, so difficult to operate the driver, driving instability. Design, in the middle of the curve, insert long enough and straight, swing line.

結果 (英文) 3:

The plane linear road to ride, not turning too much too soon. Otherwise, the route to the twists and turns, often limit the people's vision, the impact of driving the line of sight must be maintained, so that the driver is difficult to control, traffic is not stable. Design, can be in the middle of the curve, insert a sufficiently long straight line, and the roundabout.