Even if the chime doesn ' t trigger soon enough in poor weather , I still feel its better than no chime . The system doesn ' t give positive feedback , indicating that your following distance is okay . It only lets you know when it ' s a problem . For this reason I don ' t think it will retrain people to use the wrong following distance in poor weather . I also don ' t think people will become dependent on it either . I don ' t need the seat belt chime to remind me to put it on . Its just nice when I forget . I think wherever the limit is set users will initially dislike it , furthermore there will always be people disabling it . I don ' t claim to know what following distance should be exactly . An empirical study could determine the ideal following distance to maximize safety and traffic throughput while keeping the annoyance factor low enough to maintain user compliance .