Abstract
This study examined driving behavior when using limited driving support systems. Specifically, we investigated the effects of driver comprehension level on driving behavior using a low-speed ACC (Adaptive Cruise Control) system in driving simulator experiments. The comprehension level was set to three conditions, "low," "middle," and "high," by the experimenter's instructions. We obtained the following results. Subjects with a low comprehension level for system limits exhibited greater braking latency when the system reached its support limits, and some of them collided with the preceding vehicle. Subjects with middle-level comprehension braked as safely as subjects with high comprehension.
