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Open AccessArticle

Traffic State Estimation and Classification on Citywide Scale Using Speed Transition Matrices

Faculty of Transport and Traffic Sciences, University of Zagreb, HR-10000 Zagreb, Croatia
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Sustainability 2020, 12(18), 7278; https://doi.org/10.3390/su12187278
Received: 29 July 2020 / Revised: 28 August 2020 / Accepted: 1 September 2020 / Published: 4 September 2020
The rising need for mobility, especially in large urban centers, consequently results in congestion, which leads to increased travel times and pollution. Advanced traffic management systems are being developed to take the advantage of increased mobility positive effects and minimize the negative ones. The first step dealing with congestion in urban areas is the detection of congested areas and the estimation of the congestion level. This paper presents a a method for a traffic state estimation on a citywide scale using the novel traffic data representation, named Speed Transition Matrix (STM). The proposed method uses traffic data to extract the STMs and to estimate the traffic state based on the Center Of Mass (COM) computation for every STM. The COM-based approach enables the simplification of the clustering process and provides increased interpretability of the resulting clusters. Using the proposed method, traffic data is analyzed, and the traffic state is estimated for the most relevant road segments in the City of Zagreb, which is the capital and the largest city in Croatia. The traffic state classification results are validated using the cross-validation method and the domain knowledge data with the resulting accuracy of 97% and 91%, respectively. The results indicate the possible application of the proposed method for the traffic state estimation on macro- and micro-locations in the city area. In the end, the application of STMs for traffic state estimation, traffic management, and anomaly detection is discussed. View Full-Text
Keywords: speed transition matrix; traffic state estimation; traffic state classification; center of mass; intelligent transport systems; speed probability distribution speed transition matrix; traffic state estimation; traffic state classification; center of mass; intelligent transport systems; speed probability distribution
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MDPI and ACS Style

Tišljarić, L.; Carić, T.; Abramović, B.; Fratrović, T. Traffic State Estimation and Classification on Citywide Scale Using Speed Transition Matrices. Sustainability 2020, 12, 7278. https://doi.org/10.3390/su12187278

AMA Style

Tišljarić L, Carić T, Abramović B, Fratrović T. Traffic State Estimation and Classification on Citywide Scale Using Speed Transition Matrices. Sustainability. 2020; 12(18):7278. https://doi.org/10.3390/su12187278

Chicago/Turabian Style

Tišljarić, Leo; Carić, Tonči; Abramović, Borna; Fratrović, Tomislav. 2020. "Traffic State Estimation and Classification on Citywide Scale Using Speed Transition Matrices" Sustainability 12, no. 18: 7278. https://doi.org/10.3390/su12187278

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