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PMSS Project Details


Project ID:FHWA-PROJ-10-0086
Project Name: System Performance Measurement Using Loop Infrastructure, Iteris-Phase II: Product Development (102FH2-05)
Status: Active
Last Name:Gibson
First Name:David P
Office: Office of Operations Research and Development
Team:Trans Enabling Technologies Team
Roadmap/Focus area(s): Intersections
Project Description:The objective of this project is to develop an inductive loop-based technology for monitoring the travel time and origin-destination performance of vehicles that augments a Bluetooth-based travel time system now under development. To their advantage, loop signatures characterize almost 100 percent of the vehicles traveling over them while Bluetooth technology characterizes none of them. Bluetooth always correctly re-identifies vehicles while loops may mismatch or miss signature matches.  Research findings during phase I of this project have led the research team to conclude that it is feasible to use 60 Hertz (Hz) samples from single loop detectors in order to perform re-identification between loop detector stations on freeways. The method employed was robust to loop calibration errors, easily corrects for metadata concerning the exact location of the loops, and demonstrated that it was possible to re-identify vehicles up to 1.5 miles away (which was the extent of our test section). This project proposes to productize this research by implementing the software in the commercial archive data management systems, PeMS. We will then perform large field tests of this methodology in both a congested, urban area as well as in a rural area in order to demonstrate its effectiveness over a variety of conditions. These tests will be done on live freeways with the support of California Department of Transportation (Caltrans).
Start Date: September 14, 2012
End Date: May 14, 2014
Goals:The key project objective was to see if the development of a traffic performance measurement was possible using existing loops.
Test Methodology: Implement algorithms in software and test in a variety of field conditions
Partners: U.S. Department of Transportation: Pipeline and Hazardous Materials Safety Administration (PHMSA); Role(s): Other stakeholder
Expected Benefits:Congestion mitigation. Real-time Traveler Information. Transportation management. Emergency response. Operations. Planning. Data and Analysis Tools. Intersection Safety.
Project Findings:This phase I project was successful and established the possibility of obtaining travel time data using high-frequency conventional loop data. A phase II followup project was recommended.
Keywords: Traffic
Travel Time
Subject Areas: Data and Information Technology
Operations and Traffic Management
Planning and Forecasting