It also discusses function of city circular road construction, the necessity of performing by stages and the station of viaduct in circular road.

并且对城市环路建设的作用，分期实施的必要性，高架路在环路中的地位进行了探讨。

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This paper introduces the setting of control net in road construction survey and presents the method of detailed setting out for circular curve by means of avertence Angle and chord.

阐述了道路施工测量中控制网的布设及用偏角和弦长进行圆曲线详细放样的方法。

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