Proposed Test Protocol for Video Imaging Detection at Intersection Stop Lines
Author(s):
D.R. Middleton, R.R. Longmire, H.A. Charara, D. Bullock
Publication Date:
August 2010
Abstract:
Test protocols for non-loop detectors have often required comparing the performance attributes of these detectors with those of loops or other point detectors, or to manual counts. However, that comparison is not always appropriate for a variety of reasons, and it does not provide all of the critical information needed to make acceptance or rejection decisions. The proposed video image vehicle detection system (VIVDS) test concept and performance measures can be incorporated into future purchasing decisions and used to uniformly evaluate VIVDS products. The test metrics apply primarily to stop line detection with less emphasis on upstream or dilemma zone detection.
The proposed test protocol includes the following performance measures: the detector activation times of VIVDS when vehicles arrive in a detection zone, detection of the end of the stop line queue just after the beginning of the green phase, missed detections (vehicle present but not detected), false calls or false positives (artifacts that should not be detected), and vehicles detected but then dropped while vehicles are still in the detection zone.
The document also describes field data collection and interpretation and test protocol application.
Report Number:
0-6030-P2
Electronic Link(s):
Document/Product
http://tti.tamu.edu/documents/0-6030-P2.pdf
Publication/Product Request
TTI reports and products are available for download at no charge. If an electronic version is not available and no instructions on how to obtain it are given, contact the TTI Library.