Roadside Pedestrian Notification Using Time-Distance Thresholds

The patent changes the notification parameter from spatial distance to time distance. The controller calculates the time distance from the automated driving vehicle to the roadside apparatus based on vehicle speed and spatial distance, then uses this time distance to determine notification timing. This parameter transformation enables more accurate timing of notifications to both the vehicle and pedestrian, resolving the contradiction between notification coverage and timing accuracy.

The patent transforms the fixed spatial distance threshold into a dynamic time distance threshold. The controller calculates time distance in real-time based on current vehicle speed and spatial distance, and adjusts the notification threshold dynamically according to external environmental factors such as weather conditions, time of day, and pedestrian behavior patterns. This dynamic approach maintains implementation simplicity while significantly improving environmental adaptability.

The patent applies local quality by differentiating notification strategies based on pedestrian characteristics and situational context. The controller analyzes pedestrian attributes such as age, gender, clothing color, and behavior patterns to determine the appropriate notification threshold for each individual case. It also considers local environmental factors like crosswalk locations, pedestrian zones, and weather conditions. This localized approach ensures high safety coverage while reducing false alarms by tailoring notifications to specific pedestrian situations rather than using a uniform threshold for all pedestrians.