Cyclists show the maneuver of the unit. And they, probably, only because of such a strange drivers whisper and miss even when in priority.

I am an entertainer with an internship, both in winter and in summer. I show manoeuvres must, but only if there is someone to show. Because I want to live. I don’t think it is necessary to walk with my hands on an empty crossroads. So from experience I will say - many drivers dumb don't know what it means a hand raised up, bended in the elbow. Some even stumbled and tried. Show it, don’t show it, it doesn’t make sense. One even shrugged his hand in response, thinking I would say hello to him.)))