01595122

Component

https://doi.org/10.3141/2557-06

Video-imaging technology has long been used for vehicle detection at signalized intersections. This technology provides many advantages over conventional inductive loops. Video-imaging cameras are easier and safer to install and maintain; the cameras cause no damage to the pavement; and detection zones can be adjusted or redrawn when travel lanes are realigned or reassigned as a result of widening or remarking of the pavement. Despite the advantages, video-imaging cameras are generally susceptible to varying lighting conditions. Thermal-imaging cameras produce images on the basis of the difference in thermal energy emitted by objects and do not rely on visible light. Thus, the cameras are more robust in various lighting conditions. In this paper, both video-imaging and thermal-imaging technologies were evaluated for stop bar vehicle detection at signalized intersections. The detection errors were correlated with concurrent weather and environmental conditions. The performance of both types of cameras appears to be affected by wind and various weather events. In particular, uneven shade appears to be an issue for the video-imaging camera but not for the thermal-imaging camera. The video-imaging camera seems to be more susceptible to false calls at night, likely caused by vehicle headlights. A higher chance of missed calls and calls stuck on was experienced for the thermal-imaging camera at night.

01610396

16-4646

English

pp 55–65

2016

Transportation Research Record: Journal of the Transportation Research Board

9780309369909

Print

Figures (5) ; Photos; References (18) ; Tables (6)

Cameras; Errors; Signalized intersections; Thermal imagery; Vehicle detectors; Video imaging detectors

Data and Information Technology; Highways; Operations and Traffic Management; Safety and Human Factors

PRP, TRIS, TRB, ATRI

Jan 12 2016 6:03PM

• Characterizing Emergency Vehicle Preemption Operation with High-Resolution Traffic Signal Event Data
• Efficient Priority Control Model for Multimodal Traffic Signals
• High-Resolution Field Evaluation of Radar-Based Dilemma Zone Protection System
• Impact of Green Light Optimized Speed Advisory on Unsignalized Side-Street Traffic
• Innovative Method for Remotely Fine-Tuning Offsets Along a Diverging Diamond Interchange Corridor
• Multimodal Data Analytics Comparative Visualization Tool: Case Study of Pedestrian Crossing Design
• Performance Analysis of Centralized and Distributed Systems for Urban Traffic Control
• Predictive–Tentative Transit Signal Priority with Self-Organizing Traffic Signal Control
• Safety-Related Guidelines for Time-of-Day Changes in Left-Turn Phasing
• Signal Timing for Diverging Diamond Interchanges: Fundamentals, Concepts, and Recommended Applications