The decal might be a bad idea, but having trucks display a video on their rear of what a camera sees from the front is actually incredibly useful. Who are we optimizing for now: The driver who wants to get from A to B or the autonomous vehicle?

[Disclaimer: Within a 1h radius there is not a single road with two lanes; without attentive truck drivers who signal when it is safe to pass I'd be spending at least 4h more per week on the road.]