He says the GPS has also helped protect drivers by providing specific information when a driver gets in an accident.
"In general, the guys appreciate it, but we're very fair about it," Graby says. "The supervisor often will tell them based on the GPS how they can improve the scores for their routes. For example, we want them to drive no more than 15 mph on each parking lot and the GPS tells us how fast they are driving. Well, we tell them just to slow down a little bit and the truck will pick up better.