道路中线测量是公路设计的外业工作，其主要任务就是通过对公路的交点、转点、转角、直线和平曲线的测设，沿线测定路线的里程长度并设置里程桩，最终将公路中心线的平面位置用木桩具体地标定在现场。
目前，极坐标法放样已成为道路中线侧设和桥梁施工测量的一种简便、迅速、精确的方法。
At present, the method of polar coordinates has become an easy, fast and accurate way in midline measure of road and measure in bridge construction.
本文介绍的直接计算出道路中线平面坐标的方法和道路设计计算程序，完全解决了上述问题。
However, the method of directly calculating the planimetric coordinates of the centre line on the road and the calculating program of road design can completely solve the problems above.
介绍了利用线路平面控制网的控制点测设道路工程中组合曲线中线桩点位的坐标计算、测设方法。
A method for calculating and measuring the coordinates of centering stakes using line control counts in plane control meshwork is introduced in highway construction in this paper.
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