I hear you on that kind of experience Gangman!
I know it may aggrevate some car drivers but two things I do seem to have helped me in "those" driving situations that we all know about.
I put LOUD car horns on all our bikes & I will give a short little "toot" on them as I see a car rolling up to the road I'm on from a side street. It is amazing how many times it makes them snap their heads in my direction & then complete their stop. Also I give a little "waggle" of the bike to move the headlight about to show oncoming car drivers that want to turn in front of me that "I'm Here!". Can't quantify if these tactics have worked but so far so good.
I also give a little "pre stop" which is just a bit of premature braking before I get to my turn off when there are vehicles behind me. That way they are aware I might stop before I really do & while I still have the room to get away from them. Kinda maybe wakes them up before the main event. I also use blinkers AND a hand signal before turning if cars are back there.
Bottom line is I try to do as many things AHEAD of time to break the trance car drivers seem to be in while they drive. As we all know, motorcycles lose everytime in a wreck with a 4 wheeler! :'(
