Traffic states recognition and prediction based on floating car data

Yu Yuan, Kexin Zhang, Qixiu Cheng, Zhiyuan Liu, Wei Wang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Recognition and prediction of urban traffic states are vital for congestion mitigation for the government. In this study, a trajectory dataset covering an area with 6 km2 in Chengdu was used. First, the area was divided into unified 100 × 100 m grids for convenience of aggregation. For each grid, several predefined traffic parameters were extracted based on the coordinate sequence of each car. After that, PCA (principle component analysis) was performed on the feature matrix to reduce dimension. K-means algorithm was utilized for acquiring traffic state clusters. On the basis of the clustering results, a CNN (convolutional neural network) prediction model was established for traffic states prediction. Results are as follows: (1) three different traffic states are generated, which are quite diverse with regard to the distribution of traffic parameters; (2) evolution process of traffic states was analyzed on two different scales; and (3) the prediction accuracy achieved 85% for speed prediction model.

Original languageEnglish
Title of host publicationCICTP 2019
Subtitle of host publicationTransportation in China - Connecting the World - Proceedings of the 19th COTA International Conference of Transportation Professionals
EditorsLei Zhang, Jianming Ma, Pan Liu, Guangjun Zhang
PublisherAmerican Society of Civil Engineers (ASCE)
Pages2236-2248
Number of pages13
ISBN (Electronic)9780784482292
DOIs
Publication statusPublished - Jul 2019
Externally publishedYes
Event19th COTA International Conference of Transportation Professionals: Transportation in China - Connecting the World, CICTP 2019 - Nanjing, China
Duration: 6 Jul 20198 Jul 2019

Publication series

NameCICTP 2019: Transportation in China - Connecting the World - Proceedings of the 19th COTA International Conference of Transportation Professionals

Conference

Conference19th COTA International Conference of Transportation Professionals: Transportation in China - Connecting the World, CICTP 2019
Country/TerritoryChina
CityNanjing
Period6/07/198/07/19

ASJC Scopus subject areas

  • Transportation

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