Abstract
In recent years, with the advancement in traffic sensing, data storage, and communication technologies, the availability and diversity of transportation data have increased substantially. When the volume and variety of traffic data increase dramatically, integrating multisource traffic data to conduct traffic analysis is becoming a challenging task. The heterogeneous spatiotemporal resolutions of traffic data and the lack of standard geospatial representations of multisource data are the main hurdles for solving the traffic data-integration problem. In this study, to overcome these challenges, a transportation data-integration framework based on a uniform geospatial roadway referencing layer is proposed. In the framework, on the basis of traffic sensors’ locations and sensing areas, transportation-related data are classified into four categories, including on-road segment-based data, off-road segment-based data, on-road point-based data, and off-road point-based data. Four data-integration solutions are proposed accordingly. An iterative map conflation algorithm as a core component of the framework is proposed for integrating the on-road segment-based data. The overall integration performance of the four types of data and the efficiency of the iterative map conflation algorithm in terms of percentage of integrated roadway segments and computation time are analyzed. To produce efficient transportation analytics, the proposed framework is implemented on an interactive data-driven transportation analytics platform. Based on the implemented framework, several case studies of real-world transportation data analytics are presented and discussed.
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Data Availability Statement
Some or all data, models, or code used during the study were provided by a third party, such as the following:
1.
Data sources used for data integration in the experiments of this study.
2.
The shape file of the geometric referencing layer.
Direct requests for these materials may be submitted to the provider as indicated in the acknowledgments. Some or all data, models, or code generated or used during the study are available from the corresponding author by request, such as the source code of the proposed data-integration framework/algorithm.
Acknowledgments
This study was supported by the SHRP2 Reliability Data and Analysis Tools (L38) project from WSDOT. Thanks to WSDOT for providing the raw data and the referencing layer for this study.
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Journal of Transportation Engineering, Part A: Systems
Volume 146 • Issue 5 • May 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Feb 25, 2019
Accepted: Sep 16, 2019
Published online: Feb 19, 2020
Published in print: May 1, 2020
Discussion open until: Jul 19, 2020
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