Mapping to Cells: A Simple Method to Extract Traffic Dynamics from Probe Vehicle Data

Computer-Aided Civil and Infrastructure Engineering - Tập 32 Số 3 - Trang 252-267 - 2017
Zhengbing He1, Liang Zheng2, Peng Chen3, Wei Guan1
1School of Traffic and Transportation, Beijing Jiaotong University, Beijing, China
2School of Traffic and Transportation Engineering, Central South University, Changsha, China
3School of Transportation Science and Engineering, Beihang University, Beijing, China

Tóm tắt

AbstractIn the era of big data, mining data instead of collecting data are a new challenge for researchers and engineers. In the field of transportation, extracting traffic dynamics from widely existing probe vehicle data is meaningful both in theory and practice. Therefore, this article proposes a simple mapping‐to‐cells method to construct a spatiotemporal traffic diagram for a freeway network. The method partitions a network region into small square cells and represents a real network inside the region by using the cells. After determining the traffic flow direction pertaining to each cell, the spatiotemporal traffic diagram colored according to traffic speed can be well constructed. By taking the urban freeway in Beijing, China, as a case study, the mapping‐to‐cells method is validated, and the advantages of the method are demonstrated. The method is simple because it is completely based on the data themselves and without the aid of any additional tool such as Geographic Information System software or a digital map. The method is efficient because it is based on discrete space‐space and time‐space homogeneous cells that allow us to match the probe data through basic operations of arithmetic. The method helps us understand more about traffic congestion from the probe data, and then aids in carrying out various transportation researches and applications.

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Thông tin xuất bản

Computer-Aided Civil and Infrastructure Engineering

Tập 32 Số 3

252-267

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