土木工程英语证书(PEC)考试-道路勘测设计专业术语道路road公路highway都市道路city road;urban road厂矿道路factories and mines road林区道路forest road乡村道路country road车辆换算系数vehicle conversion factor城间道路interurban road都市出入口公路city approach highway道路工程road engineering丝绸之路the silk road道路网road metwork道路(网)密度density of road network道路技术原则technical standard of road设计车辆design vehicle特种车辆special vehicle计算行车速度(设计车速)design speed道路建筑限界boundary line of road construction道路用地范围right of way净空clearance等级道路classified road辅道relief road高速公路free way;motorway部分控制进入partial control of access等级公路classified highway等外公路substandard highway干线公路arterial highway支线公路feeder highway国家干线公路(国道)natilnal trunk highway省干线公路(省道)provincial trunk highway县公路(县道)county road乡公路(乡道)township road (county road) 绕行公路bypass公路自然区划clinatic zoning for highway (都市)迅速路expressway(都市)主干路a