西安市主要活动中心公交先到达性研究

Transit-auto rapidity analysis of main activity centers in Xi'an

基于国内外公共交通绩效评价现状,本文提出利用公交先到达性对公交系统出行快慢和效率进行综合评价,并利用Arcgis分析计算高峰时段、高峰方向西安市主要活动中心门对门常规公交与小汽车出行时间差,对西安市常规公交先到达性进行度量。研究发现,城市范围内公交先到达较好(服务水平C级以上),中轴线上部分活动中心间的公交先到达性达到A级;郊区范围由于公交服务少、换乘多且不便,先到达性降低。需要从公交专用道功能提升、交叉口信号优先、路权优先以及换乘衔接改善等公交优先措施入手,配合公交服务质量提高,才能将西安市公交先到达性保持在较好水平,吸引更多小汽车使用者转向公交出行。

Based on the transit performance measurement status both at home and abroad,transit-auto rapidity measure,which could comprehensively evaluate travel efficiency of the transit system was put forward in this paper and the transit-auto rapidity of Xi＇an was estimated by using Arcgis to calculate peak hour and peak direction transit-auto travel time differences among main activity centers. It＇s discovered that urban area provides good service（ above＂C＂level）,while activity centers along medial axis even provide service of＂A＂. Because of few transit services and high number of inconvenient transfers involved,transit-auto rapidity declines in suburbs. Transit-auto rapidity in Xi＇an will keep a good level and more car drivers will shift to public transport modes if transit priority measures like bus lane function improvement,intersection signal priority,right of way and transfer improvement are taken and transit service quality is improved at the same time.