Measuring road user behavior with an instrumented car and an outside-the-vehicle video observation technique
conference paper
The limitations of human information processing capabilities are apparent in modern road traffic. Research methods for studying road user behavior range from unobtrusive observations of actual traffic to highly controlled laboratory experiments. Often the incompatibility between controllability and validity makes the choice of a suitable method diflîcult. Described in this paper are recent developments in two research methods used at the TNO Institute for Perception. In-car measurements using an instrumented car enable a detailed analysis of the behavior of the individual driver. The behavior of arbitrary road users can be analyzed quantitatively by outside measurements with video techniques. Recently developed computer-based techniques allow the quick, efficient, and flexible use of both methods. The methods are illustrated by examples of recent research in which driver behavior is analyzed in terms of time-related measures. At the control level of the driving task, several results can be explained by the Time-to-Line-Crossing (TLC) measure. At the guidance level, the Time-to-Collision (TTC) measure defines the severity of interactions between road users. The correspondence between the results of both approaches suggests that drivers directly use such time measures for vehicle control and decisionmaking strategies in traffic.
Beschrijving van twee meetmethoden, geïnstrumenteerd voertuig en video-observatie. Overeenkomst tussen analyses van rijgedrag met TLC en TTC suggereert dat tijdmaten een directe rol kunnen spelen bij het beslissen in het verkeer.
Topics
TNO Identifier
6793
Publisher
Transportation Research Board
Source title
Human Performance and Highway Visibility
Place of publication
Washington
Pages
72-81
Files
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