高等级公路路面抗滑石料
highway pavement stone sliding
公路路面早损
breakage of highway pavement in early time
GPS公路网
vector road map measured by GPS
城市群公路网
urban agglomeration highway network
大断面公路隧道
Highway Tunnel with Large Cross Section
地下公路网
underground highway network
高速公路公司
expressway administration company with limited liability
freeway business group