论交通信号如何影响城市道路基本图(Fundamental Diagrams)
On How Traffic Signals Impact the Fundamental Diagrams of Urban Roads
AI总结:
本研究针对交通信号对城市道路基本图的影响问题,提出将传统基本图参数建模为信号方案因素函数的简约公式,经盐湖城道路数据验证,深化了信号设置对拥堵模式影响的认知。
摘要:
基本图(FD)是关联速度、流量和密度这三个关键宏观交通变量的核心工具,被交通与规划从业者广泛采用。我们实证分析了不同信号设置下车辆空间平均速度与流量的关系,并提出传统FD的一种简约参数函数形式,其函数参数被明确建模为信号方案因素的函数。我们利用美国犹他州盐湖城信号控制城市道路段的数据验证了所提公式。该公式加深了我们对信号设置变化如何影响信号控制城市路段FD乃至更广义拥堵模式的理解。
英文摘要:
Being widely adopted by the transportation and planning practitioners, the fundamental diagram (FD) is the primary tool used to relate the key macroscopic traffic variables of speed, flow, and density. We empirically analyze the relation between vehicular space-mean speeds and flows given different signal settings and postulate a parsimonious parametric function form of the traditional FD where its function parameters are explicitly modeled as a function of the signal plan factors. We validate the proposed formulation using data from signalized urban road segments in Salt Lake City, Utah, USA. The proposed formulation builds our understanding of how changes to signal settings impact the FDs, and more generally the congestion patterns, of signalized urban segments.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。