Trucks and buses account for a disproportional number of bicycle fatalities, with a rate of 5-10 times that of cars.
Here's an article discussing some technical approaches to addressing this that are being field tested in the UK.
Hopefully, one or more will pass muster and be deployed in the future. But we shouldn't rely on some technical crutch that can fail, nor should cyclists depend on the skill of the unknown driver of a nearby truck. The best and most realistic way to reduce these accidents already exists. It's a question of rider awareness, as much as driver awareness, and the real answer is for cyclists to recognize blind spot hazards and do what's necessary to protect themselves.