[andy_boot]

I'm fairly sure if you just park your car in front of the truck on a remote highway the drive safety systems will kick in and stop the truck. Then you jump out and crowbar/bolt-cutter the container.

Of-course it will probably detect you doing that and call for help complete with its GPS position.

I also expect some enterprising think-outside-the-box robbers will temporarily come up with some creative way round this. (Will phone jammers stop the truck calling for help?)

It'll be interesting when it happens.