I've noticed that pedestrians don't seem to hear the proximity warning device, or if they do hear it, they ignore it. Yesterday in separate incidents, I watched as four people walked in front of me without even turning their heads. A fifth did look in my direction, but I couldn't tell if it was because he heard the car or he was checking for cars before he crossed at a corner. A guy with him stepped off the curb without looking for traffic. One pedestrian in a parking lot walked the length of the aisle of parked cars, right in the middle, with me following. I haven't come upon a visually-impaired person as yet, but there is a such a person in my neighborhood for whom this system was designed, so I will be watching for his reaction, and that of his dog.