Jay Leno feels the same way (I didn't know he wrote) He has some cool old manuals, including one for a Honda motorcycle:
"At the rise of the hand by policeman, stop rapidly. Do not pass him by or otherwise disrespect him." It goes on to say, "When a passenger of the foot, hooves in sight, tootel the horn trumpet melodiously at first. If he still obstacles your passage, tootel him with vigor and express by word of mouth, warning, Hi! Hi!" And even more importantly, "Give big space to the festive dog that makes sport in roadway. Avoid entanglement of dog with wheel spokes.