which is why I make eye contact with drivers who stop for me, smile sweetly, mouth a big "Thank You" accompanied by a friendly nod and wave all while hustling across as fast as I can. they appreciate it and usually wave and smile right back
Road rage is expressed against other people/cars/bikes because of an inability to communicate. Taking action against another (verbal, physical, note leaving, etc.) is all a way that people communicate their displeasure with others, on and off the road.