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Operational characteristics of mixed traffic flow under bi-directional environment using cellular automaton 被引量:6
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作者 Zhenke Luo Yue Liu Chen Guo 《Journal of Traffic and Transportation Engineering(English Edition)》 2014年第6期383-392,共10页
Mixed traffic flow composed of autos and non-autos widely exists in developing countries and areas. To investigate the operational characteristics of the mixed traffic flow consisting of vehicles in different types (... Mixed traffic flow composed of autos and non-autos widely exists in developing countries and areas. To investigate the operational characteristics of the mixed traffic flow consisting of vehicles in different types (large vehicles, cars, and bicycles), we develop a cellular automaton model to repli- cate the travel behaviors on a bi-directional road segment with respect to the physical and mechanic features of different vehicle types. By implementing the essential parameters calibrated through the field data collection, a numerical study is carried out considering the variation in volume, density, and velocity with different compositions of mixed traffic flows. The primary findings include: the average ve- locity of traffic flow and total volume decrease 60% and 30% after incorporating 10% bicycles, respectively; the phenomenon of double-summit in terms bicycle is beyond 60 % ; the maximal total volume higher than 10 %. of the total volume appears when the proportion of starts to recover when the proportion of bicycle is 展开更多
关键词 mixed traffic flow operational characteristic cellular automaton bi-directional environ-ment
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多源数据融合法更新公路通道车流OD矩阵
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作者 丁乃侃 朱顺应 +1 位作者 王红 刘兵 《武汉理工大学学报(交通科学与工程版)》 2012年第6期1265-1269,共5页
为了低成本地获取高速公路改扩建时交通运行管理用的更高精度公路通道车流OD矩阵,提出了基于工程预备阶段调查车流OD、互通出入口流量、部分路段流量等多元数据融合法更新分车型车流OD矩阵的新方法.该方法基于线性回归法识别需要调整的O... 为了低成本地获取高速公路改扩建时交通运行管理用的更高精度公路通道车流OD矩阵,提出了基于工程预备阶段调查车流OD、互通出入口流量、部分路段流量等多元数据融合法更新分车型车流OD矩阵的新方法.该方法基于线性回归法识别需要调整的OD对,并结合互通与交通小区的映射关系调整OD;再利用χ2检验比较分配得到的路段流量与调查得到的路段流量的一致性,以判断调整后OD的准确性.该方法为提高车流OD的精度实行了双重校核.用该方法对京港澳高速公路(河北段)改扩建区域OD调整校核进行了实例分析,结果表明,在数据来源可靠的情况下,可实现对区域OD的更新和校核. 展开更多
关键词 公路通道 OD矩阵 数据融合 改扩建 交通运行管理
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