01043556

Component

https://doi.org/10.3141/1993-08

http://scholar.google.com...erer&publication_year=2007

There has been a growing interest in using anonymous tracking of wireless devices as a way to generate travel time and operational data cost-effectively. Unfortunately, there are relatively few independent quantitative evaluations of these systems. Evaluations that do exist are often not widely available, so agencies often enter into deployment agreements with a limited understanding of the abilities and limitations of this technology. This paper provides an overview of the results of past deployments of wireless probe monitoring systems. It also discusses a simulation study of the predominant type of system on the market today, handoff-based monitoring systems. Past deployments show that early-generation systems encountered significant problems in generating accurate speed estimates. More recent tests using handoff-based technology have shown improvement in data quality at some sites, but there are not enough data to characterize fully whether those systems can consistently provide useful operational data. The simulation study indicates that the way in which the cellular network topology overlays the roadway network could be a critical determinant of overall system effectiveness. Simulation results indicate that often with simulated handoff-based systems speeds can be estimated to within 5 mph.

01077529

English

pp 51-58

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104197

Print

References (16) ; Tables (5)

Cost effectiveness; Data collection; Information technology; Location theory; Simulation; Speed; Technological innovations; Tracking systems; Traffic surveillance; Transportation departments; Travel time; Wireless communication systems

Wireless location technology

Data and Information Technology; Economics; Highways; Planning and Forecasting; I72: Traffic and Transport Planning

TRIS, TRB

Feb 8 2007 5:01PM

• Analysis of Traffic Sign Asset Management Scenarios
• Automated Consensus-Based Data Verification in Caltrans Detector Testbed
• Composite Nearest Neighbor Nonparametric Regression to Improve Traffic Prediction
• Dashboards for Transportation Operations: Detector Health Case Study
• Development of a Regional Routing Model for Strategic Waterway Analysis
• Estimating Highway Investment Requirements with Uncertain Demands
• Evaluating the Highway Capacity Manual’s Adjustment Factor for Annual Weekday to Annual Average Daily Traffic: Applying a Consistent Traffic Data Methodology
• Impact of Data Integration on Some Important Travel Behavior Indicators
• Impact of Nonresponse and Weighting in Swedish Travel Survey
• Impact of Traffic Flow on Travel Time Variability of Freeway Corridors
• Internet-Based Mapping Prototype for Integration with an Electronic Freight Theft Management System
• Investigating Transferability of National Household Travel Survey Data
• New Methodology for Customizing Quality Assessment Techniques for Traffic Data Archives
• Numerical Characterization of Gross Vehicle Weight Distributions from Weigh-in-Motion Data
• Random Count Site Selection Process for Statistically Valid Estimations of Local Street Vehicle Miles Traveled
• Real-Time Detection and Tracking of Vehicle Base Fronts for Measuring Traffic Counts and Speeds on Highways
• Revised Method for Estimating Design Hourly Volumes in Vermont
• Use of Iterative Proportional Fitting Algorithm for Combining Traffic Count Data with Missing Dimensions
• Using Dual-Loop Event Data to Enhance Truck Data Accuracy
• Utilizing Real Options for Revenue Risk Mitigation in Transportation Project Financing
• Video-Based Vehicle Detection and Classification System for Real-Time Traffic Data Collection Using Uncalibrated Video Cameras