Oversized loads on roads CBs are essential for other trucks to know whats is coming towards them and how wide, usually runs like clock work when passing each other. CBs i reckon are not as bad as mobile phones as you cant talk over each other generally, talk - listen - talk, mobiles you can cut over the other person easily and then you end up saying sorry - whats thats - you first - missed that - didn't get that - etc. I think causes a quick lapse in concentration which can be more dangerous. I have enough trouble using mobiles at home let alone driving
Half of Australia has got their head down looking at their mobile doing something while walking, sitting, riding, shopping, working, driving oblivious to whats going on around them. Its world wide obsession imo