traffic density短语¹³¹⁶²⁰⁺³ 基本例句 业务量密度,占线密度 Highway network planning is required to follow certain procedures. Discussion is made on the measurement of traffic density, design methods and assessment principles. 介绍了公路网规划应遵循的程序，并着重阐述了交通量预测方法、路网规划设计方法、路网规划的评价原则等。 cnki