It is not known who was the first and which country invented paper policemen stand along the road, but the idea caught on and spread through the world. Dummies are varying degrees of reliability and wretchedness.
The main purpose of dummy – to draw attention to the way that drivers do not forget to observe speed limits .
Good ” has come ” and ” zebra” in 3D. The driver gets the impression that the front – a real obstacle , and it slows .