The only people who should concern themselves with these safety/monitoring devices are those who are not following the methods. I have to disagree with an earlier post in which the person advised everyone to "slow down and follow the methods." I follow the methods and consider myself to be a very efficient driver so you don't necessarily have to use shortcuts to get the job done quickly. Knowing the DIAD inside and out, having a good memory, spending as little time in the back of the truck as possible (they called that "massaging the packages" when I started 19 long years ago) and, most importantly, knowing your customers and their preferences all lend themselves to a smooth day.