I have a peculiar request. I currently have an AVL system that will tracvk vehicle location during winter operations, however, it has some noticeable deficiencies. While I can track a trucks progress through a given route I cannot account for roads that were simply traveled across but not treated. I saw that there is a mobile portion that has a button that the driver can press in the event that they do not have a tracking unit, but how can I accomplish the same treatment tracking on a unit that simply has the GPS unit and no user intervention capability.