All good comments. I agree that a bright color "may" help. Mine is BRG, I also have a flag up at the back.
But the main think is assuming they are all dummies. With all the electronic toys, people drive even worse now than 15 years ago. It is hard to see with a phone held in front of the face or looking down at the lap. Years ago, people ran red lights and would swear it was still yellow, close to the light change. Now about once a month I see someone go through a red light that may be half way through the cycle. They are truly driving blind. Same with stop signs. Not a slight roll, but straight through at 35 mph. Yikes! Stay away from everyone and keep your head on a swivel.