Abstract
To examine the mechanism of driver gap acceptance in turning across opposite traffic, we analyzed the skilled and unskilled drivers' judgments with the two-stage serial processing model for gap acceptance in turning across opposite traffic. In this model, the driver judges gap acceptance based on the spatial gap size first. When the driver can not judge in this process, he or she judges based on the temporal gap size. The results of the analysis indicate that such a basic mechanism is applicable for both skilled and unskilled drivers, and that driving skill adjusts the thresholds of the judgment in each stage of the model.
