GPS-based Anti-Terrorist "Stop Speeding Trucks" Tech Under Attack

Perhaps I haven't had enough coffee this morning because it seems obvious that one should be able to construct a pithy logical statement that encapsulates the notion that it can't be a good idea to mandate a remotely-controlled software-based solution that provides a single point of failure to a theoretical 'problem' that involves a vast network of easily-hacked analog machines. It's one thing to consider the use of remote-takeover of airliners, where it might be possible to create a secure interface (both in terms of assuring the integrity of the digital-mechanical hardware and the processes by which the system could be activated) but trucks? If you think CD copy-protection is an example of digital hubris, wait until you try to screw around with truckers.