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Spatiotemporal Analysis of Bluetooth Data: Application to a Large Urban Network
- Source :
- IEEE Transactions on Intelligent Transportation Systems, IEEE Transactions on Intelligent Transportation Systems, IEEE, 2015, 16 (3), pp 1439-1448. ⟨10.1109/TITS.2014.2367165⟩
- Publication Year :
- 2015
- Publisher :
- HAL CCSD, 2015.
-
Abstract
- The emergence of new technologies allows better monitoring of traffic conditions and understanding of urban network dynamics. Bluetooth technology is becoming widespread, as it represents a cost-effective means for capturing road traffic in both arterials and motorways. Although the extraction of travel time from Bluetooth data is fairly straightforward, data reliability and processing is still challenging with the issues of penetration rate, mode discrimination, and detection quality. This paper presents a methodological contribution to the use of Bluetooth data for the spatiotemporal analysis of a large urban network (Brisbane, Australia). It introduces the concept of the Bluetooth origin–destination (B-OD) matrix, which is built from a network of 79 Bluetooth detectors located within the Brisbane urban area. The B-OD matrix describes the dynamics of a subpopulation of vehicles, between pairs of detectors. The results show that the characteristics of urban networks can be effectively represented through B-OD matrices. A comparison with loop detector data enables an assessment of the results' significance. Then, the spatiotemporal structure of the network is analyzed with two different clustering analyses, namely, latent Dirichlet allocation (LDA) and $K$ -means. While LDA is used to detect a temporal pattern, the $K$ -means algorithm highlights Bluetooth fundamental diagram (BFD) classes. The results show that Bluetooth data has the potential to be a reliable data source for traffic monitoring. By highlighting hidden structures of a large area, the algorithm outputs allow us to provide the road operators with a fine spatiotemporal analysis of their network, in terms of traffic conditions.
- Subjects :
- LATENT DIRICHLET ALLOCATION LDA
BLUETOOTH
Computer science
ZONE URBAINE
Urban area
computer.software_genre
SPATIO TEMPORAL CLUSTERING
Latent Dirichlet allocation
law.invention
SYSTEME DE TRANSPORT INTELLIGENT
Bluetooth
symbols.namesake
[INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI]
law
FORECASTING
11. Sustainability
Cluster analysis
K-MEAN
geography
Data processing
geography.geographical_feature_category
Mechanical Engineering
Detector
k-means clustering
Mode (statistics)
Computer Science Applications
PREVISION
DEPLACEMENT (TRAJET)
Automotive Engineering
symbols
TRAFFIC TYPOLOGY
Data mining
RESEAU URBAIN
computer
Subjects
Details
- Language :
- English
- ISSN :
- 15249050
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Intelligent Transportation Systems, IEEE Transactions on Intelligent Transportation Systems, IEEE, 2015, 16 (3), pp 1439-1448. ⟨10.1109/TITS.2014.2367165⟩
- Accession number :
- edsair.doi.dedup.....b667e3de49f8096e0a8f73adf2fa1325