Study for Estimation of Density Field of Automobile Traffic Flow

Today, many automobile traffic jams always occur on expressways. A traffic jam burdens drivers with congestion, and causes air pollution. In order to avoid a traffic jam, the traffic information should be offered. Ordinary method which detects the traffic jam requires many traffic detectors on the r...

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Bibliographic Details
Published inShisutemu Seigyo Jouhou Gakkai rombunshi Vol. 11; no. 3; pp. 120 - 126
Main Authors SAKAMOTO, Takayuki, MATSUMOTO, Yoshiya, NAKANISHI, Tsunehiko
Format Journal Article
LanguageJapanese
English
Published THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE) 1998
Subjects
bottleneck
critical density
density field
jam propagation
shock wave
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Summary:Today, many automobile traffic jams always occur on expressways. A traffic jam burdens drivers with congestion, and causes air pollution. In order to avoid a traffic jam, the traffic information should be offered. Ordinary method which detects the traffic jam requires many traffic detectors on the roads, but these systems are very large and expensive to construct. By using the characteristic lines method, it is possible to estimate the traffic density between two detecting points. This method can be applied on condition that the property of road is uniform, but the property of practical road is not uniform. There are some bottleneck points like tunnels that cause traffic jams. This paper reports the method that determines the change of traffic density at the entrance of bottleneck. As a result, the characteristic lines method is also useful on the long road which includes a bottleneck section.
ISSN:1342-5668
2185-811X
DOI:10.5687/iscie.11.120