PIARC：2020-2023年道路和道路运输数据手册（英文版）

Under the adverse circumstances of COVID-19 spreading across the world, many road administrations have to take further austerity measures while investing in construction of road network,maintaining/rehabilitating existing aged roads,ensuring increased traffic safety and so on. Then they are requested to adequately assess the importance of political measures to be taken and implement them effectively.Also they should not fail to review the current situation of roads and road transport in an ob