表1-2各级公路技术参数公路等级高速公路一级公路二级公路三级公路四级公路地形平原微丘山岭重丘平原微丘山岭重丘平原微丘山岭重丘平原微丘山岭重丘平原微丘山岭重丘计算行车速度(km/h)12010010060804060304020行车道宽度(m)2×7.52×7.52×7.52×7.597763.5路基宽度(m)2624.524.521.5128.58.57.53.5平曲线最小半径(m)极限值65040040012525060125306015一般值10007007002004001002006510030停车视距(m)210110160751104075306015设计车速(km/h)//10060804060304020圆曲线长(m)//8550703550253520平曲线最小长度(m)//17010014070100507040最大纵坡(％)3546576869合成坡度值(％)10.010.510.010.59.010.09.510.09.510.0最小坡长(m)300200250150200120150100i0060设计年限(年)2020151010
