基于广义出行成本的公交线网密度合理性讨论

Thoughts Concerning Reasonable Bus Network Density Based on Generalized Trip Cost

公交线网密度是衡量城市公共交通网络发展水平的重要指标,它与城市的社会经济发展水平密切相关。在已有研究的基础上,进一步探讨公交线网密度各影响因素的时间价值,细化合理公交线网密度的计算方法,并应用广义出行成本的概念,将各时间因子以货币形式表示,从而衡量非在乘时间损失在广义成本中的比例,进一步说明线网密度对公交使用程度的影响。以成都市为例,对相应的指标结果进行解析,其结果对指导城市公交线网优化以及城市交通政策的制定具有积极的意义。

Related to urban economic development level,transit network density is an important index to measure how well the public transit network is designed and operated. The analysis begins from time indexes of transit network density,which are converted into money later,and their time value is discussed. As a result,the ratio of non-in-vehicle time loss in generalized trip cost is de-veloped,with which the deep reason of why transit network density can influence transit attraction is found out. Finally,taking Chengdu City as an example,related indexes and ideas are analyzed,which is rather positive for public transit network optimization and policy decision.