"We are a geo-technical engineering firm that has specialized in sinkhole investigations for the last ten years. We have 5 trailer mounted drill rigs that we take to our client’s homes to test for sinkhole conditions. We have been using the Advanced Tracking Technologies GPS units on our drill trucks and found them helpful in some surprising ways. Without making phone calls to our drillers, who normally cannot answer phone calls due to noise and adverse conditions, we can tell where they are, when they got there and let our customers or their legal representatives know they are on site drilling or on the way to the next job. A couple unexpected circumstances have happened that helped us make decisions on several phone calls involving aggressive driving. We are aware sometimes the public does not like trucks with trailers in front of them and several times we have had phone calls telling us our drivers were driving in a very fast and aggressive manner. We feel these units have helped us get to the truth in these cases and not only has it showed us when they were speeding, it also proved to us several times they were NOT speeding and in one case of an accident we could prove we were under the speed limit, thus protecting our driver and our company driving record. Also when our project managers take vehicles home overnight, as we sometimes allow, we can see if they are running errands with our company vehicles, which is not permitted. It just helps keep good people honest!"