Evaluation of Performance Measures for Two-Lane Expressways in Japan
Evaluation of Performance Measures for Two-Lane Expressways in Japan
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DOI：
10.1177/0361198106198800114
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发表时间：
2006
影响因子：
1.7
通讯作者：
J. L. Catbagan;Hideki Nakamura
中科院分区：
文献类型：
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作者：
J. L. Catbagan;Hideki Nakamura
在日本，双车道高速公路是作为未来扩展到四车道高速公路的临时路段存在的，尽管最近已经考虑将这种道路类型用于永久使用的建设。它们的高速公路分类可能介于普通(多车道)高速公路和普通双车道高速公路之间，具有全面的准入控制和高速限制，但每个行驶方向只有一条车道。由于这种类型的高速公路是独一无二的，其他不间断流量设施的服务水平测量方法不适用。例如，在估计跟随时间的百分比时，会很大程度上考虑相反的流速，这对驾驶条件几乎没有影响，因为所有路段都存在中值障碍物。本研究的目的是分析和比较最能描述双车道高速公路交通运行特征的可能的性能指标。在考虑的性能指标中，追随者密度很有希望，已经显示出与流量的强烈关系。由于现有数据仅在非高峰时段采集，因此必须在拥堵或接近拥堵的流量期间对跟随者流量进行进一步观察，以建立所有交通条件下的跟随者密度和体积关系。
Two-lane expressways exist as provisional sections for future expansion to four-lane expressways in Japan, although recently such roadway types have been considered for construction for permanent use. Their highway classification may fall somewhere between common (multilane) expressways and ordinary two-lane highways, with full access control and high speed limits but with only one lane per direction of travel. Since this type of highway is unique, methodologies for service level measurement of other uninterrupted-flow facilities are not applicable. Percent time spent following, for instance, is estimated with significant consideration of the opposing flow rate, which has practically no effect on driving conditions since a median barrier is present in all sections. The goal of this study is to analyze and compare possible performance measures that would best describe the traffic operational characteristics of two-lane expressways. Among the performance measures considered, follower density had much promise, having shown strong relationships with flow rate. Since the available data were only those taken during off-peak periods, further observations of follower flow must be made during congested or near-congested flow to establish follower density and volume relationships for all traffic conditions.