Quality Assessment of Outsourced Probe Data on Signalized Arterials: Nine Case Studies in Mid-Atlantic Region
This paper presents results of an I-95 Corridor Coalition sponsored project to assess the ability of outsourced vehicle probe data to provide accurate travel time on signalized roadways for the purposes of real-time operations as well as performance measures. The quality of outsourced probe data on freeways has led many departments of transportation to consider such data for arterial performance monitoring. From April 2013 through June of 2014, the University of Maryland Center for Advanced Transportation Technology gathered travel times from several arterial corridors within the mid-Atlantic region using Bluetooth traffic monitoring (BTM) equipment, and compared these travel times with the data reported to the I95 Vehicle Probe Project (VPP) from an outsourced probe data vendor. The analysis consisted of several methodologies: (1) A traditional analysis using precision and bias speed metrics. (2) A slowdown analysis which quantified the percentage of significant traffic disruptions accurately captured in the VPP data. (3) A sampled distribution method in which uses overlay methods to enhance and analyze recurring congestion patterns. (4) Lastly, the BTM and VPP data from each 24 hour period of data collection were reviewed by the research team to assess the extent to which VPP captured the nature of the traffic flow. Based on the analysis, probe data is recommended only on arterial roadways with signal densities (measured in signals per mile) up to one, probe data should be tested and used with caution for signal densities between one and two, and is not recommended when signal density exceeds two.
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Supplemental Notes:
- This paper was sponsored by TRB committee AHB10 Standing Committee on Regional Transportation Systems Management and Operations.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Sharifi, Elham
- Young, Stanley Ernest
- Eshragh, Sepideh
- Hamedi, Masoud
- Juster, Reuben M
- Kaushik, Kartik
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Conference:
- Transportation Research Board 95th Annual Meeting
- Location: Washington DC, United States
- Date: 2016-1-10 to 2016-1-14
- Date: 2016
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: 20p
- Monograph Title: TRB 95th Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Arterial highways; Case studies; Data quality; Probe vehicles; Signalized intersections; Traffic data; Traffic flow; Travel time
- Geographic Terms: Middle Atlantic States
- Subject Areas: Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 01594158
- Record Type: Publication
- Report/Paper Numbers: 16-6017
- Files: TRIS, TRB, ATRI
- Created Date: Mar 21 2016 4:42PM