I wish they would have that here! - I remember being honked at by large semi's while crawling over I10 in NM at 55mph during a severe thunderstorm. Heavy semi's don't have that problem with hydroplaning that you have with a light vehicle when the water stands on the road…Our semis here have an alarm go off when they go over 100 and for some frieght company trucks it sends an alert directly to their boss.