(17 Apr 2016, 6:38 pm)citaro5284 wrote I cannot believe that people think having such a device fitted is a waste of time.

I'm not sure that's the point, Citaro. I think the main point is if a device like this is constantly overused, then drivers might become complacent - a driver might get used to the beeping, so when they really need it (ie in your example earlier), the whole point of the system is missed.

A couple of railway collisions, IIRC, have happened this way with drivers 'chasing yellows' and resetting the AWS (Automatic Warning System) every time they pass a cautionary signal aspect. Doing this repetitively for any good period of time can lead to the actual meaning of the warning being missed and, before you know it, you're approaching a red too quickly and shoot past it.