Riding my bike with a pool noodle (cut to three feet) sticking off the side of it has eliminated aggressive and illegal motor vehicle behavior toward me on my suburb-city’s streets for almost 11 months now. You can read about it smack dab in the middle of my new book, Traveling at the Speed of Bike*. I believe I’m the only person in the USA doing this. It’s, unfortunately, necessary where I currently live.
*See links to all Amazon markets globally here.