Definitely can't remotely operate a 40 ton truck. Wireless network latency is a bit high even under ideal conditions, and latency spikes could easily cause disastrous accidents.
You can continue to rely on the automated systems for avoiding collisions. The intelligence is more with dealing with the decisions that the AI can't make.
I don’t think you’re going to be “driving” such trucks. I think you’ll be making decisions. For example, when you reach a yard and need to back it into a loading bay, you may draw a path on a map of the yard, taking into account obstacles that are there at that moment. The truck will handle the turning, backing up, and so on.
Likewise, you may be monitoring city traffic and choosing alternate routes. But you won’t be driving with one foot on the brake pedal and your hands on the steering wheel.