The article in Fast Company on GPS units on concrete trucks seems to beg why not use the GPS units as a "under house" arrest unit for machines working around environmentally sensitive areas.
As part of settlements and permits to work in a sensitive area, national forest, near streams and wetlands the machines should be fitted with GPS units and communications gear that would track the location of all on site machines throughout the time they are onsite. If machines wonder into sensitive zones warnings could go off ultimately power to the machine could be cut protecting the sensitive habitat. The exact location of these units and the permitted work zone could be provided to internet volunteers to monitor. It would also provide supervision of work in very remote locations.