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The variable message signs (VMSs) provide an effective method to mitigate urban traffic congestion and balance traffic demand through publishing guidance messages. For evaluating the mitigating effect of VMS on congestion, a general-purpose model utilizing the data mining method is developed. The data includes published messages and a large amount of historical traffic flow collected from VMS publishing...
Aiming at solving severe traffic congestion problem in metropolitan, in the last several decades, a number of traffic flow phenomena were discovered on freeways all over the world. Recent researches on traffic flow focused on developing traffic modes and methodology which could explain and reproduce all these phenomena. In this paper, observed traffic phenomena such as traffic breakdown, hysteresis,...
In this paper, handover location technique is employed for positioning mobile probes. In view of low location accuracy of handover location technique, an outlier handover location correction approach was presented that solved the problem in two phases, travel speed correction of outlier handover link and outlier handover location reposition. In the first phase, a two-layer data fusion model based...
In this paper, referring to the concepts of qualitative reasoning, the concepts, such as homogeneous measure index (HMI), are utilized to calculate the cross-lane synchronized degree of the traffic flow. The actual data of Beijing Third Ring Road are collected to describe the procedure of formation of traffic jam, and the concepts proposed in this paper are used to clearly illustrate such procedure...
At present, researches on traffic flow theory mainly focus on highway traffic, which is significantly different from urban freeway. Because traffic science is an “empirical science”, it is based on actual traffic flow data of urban freeway, the statistical features of velocity distribution at different densities have been investigated in this paper. Moreover, four steady phases: free flow, coherent-moving...
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