Cardboard cops fool Kiwi drivers

Cardboard cops fool Kiwi drivers : "Roading contractor Fulton Hogan began using the two-dimensional law enforcer after behaviour it said was endangering the life of its workers at a site in Nelson, at the top of the South Island, the Nelson Mail newspaper said."
I don't know about simple. No one else has thought of it in all their cleverness. It cut speeding cars by 75% and so it is a very effective means of changing behaviour. What else have we come up with? Of course the police do not want others to follow the tactic, but maybe Fulton Hogan needs to be used and paid to create these speed busters. It won't put police out of a job because the New Zealanders obviously have a healthy respect for their police or the cardboard car would not have modified their behaviour. Psychologically it's very interesting and it gives a big clue as to how we can manage one of the banes of our existence. Visual is obviously the way to go and signifiers are the thing to use.