The speed-density diagrams of heterogeneous traffic containing pedestrians, bicycles and powered two-wheelers in shared spaces

J. H. Chen, T. C. Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Urban design is shifting towards space sharing to reduce the dominance of vehicles on roads. With this concept, it would not be uncommon to see pedestrians and vehicles mixed in traffic. This study aims to investigate the relationship between the traffic speed and density in shared spaces. The trajectories of road users in a mixed flow containing pedestrians, bicycles and powered two-wheelers were tracked and recorded. The speeds and densities of them were measured in microscopic approach in a two-dimensional manner due to the extremely different kinetic characteristics between pedestrians and vehicles. The density was calculated using the number of road users in the alert area of certain transport mode; the speed was calculated using the displacement per second. It is found that in the speed-density diagrams, the low speed and low density combinations occurred frequently, which were eccentric comparing to the conventional traffic flow theories. The reasons for such speed-density scattering patterns were discussed.

Original languageEnglish
Title of host publicationProceedings of the 19th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2014 - Transportation and Infrastructure
EditorsZ. Leng, Y. H. Wang
PublisherHong Kong Society for Transportation Studies Limited
Pages297-304
Number of pages8
ISBN (Electronic)9789881581433
Publication statusPublished - 2014
Event19th International Conference of Hong Kong Society for Transportation Studies: Transportation and Infrastructure, HKSTS 2014 - Hong Kong, China
Duration: 2014 Dec 132014 Dec 15

Publication series

NameProceedings of the 19th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2014 - Transportation and Infrastructure

Other

Other19th International Conference of Hong Kong Society for Transportation Studies: Transportation and Infrastructure, HKSTS 2014
CountryChina
CityHong Kong
Period14-12-1314-12-15

All Science Journal Classification (ASJC) codes

  • Transportation

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