Abstract
In this study, 41 drivers in right-turn timing judgment were tested while looking at an oncoming vehicle from a stationary car in an intersection."The hasty judgment rate" was obtained as the ratio of drivers who reported hasty judgment under different kinds of traffic conditions. The hasty judgment rate changes with the following factors: (1) speed of an oncoming vehicle; (2) "the time-gap" (gap in time units) for the oncoming vehicle to arrive at the intersection; (3) the category of the oncoming vehicle; and (4) daytime and nighttime. In addition, the gap acceptance practice for 27 car drivers was conducted to reduce the hasty judgment rate. (A)