Participants estimated that drivers in red cars are more aggressive than those in beige cars. The same study showed that women were less aggressive than men.
Later, participants read about an accident with a young man in a red car and an elderly man in a beige car. Participants often put the guilt on the young driver in the red car. They assumed the speed of the red car was faster than the beige. It wouldn’t be weird if the speed was given, but speed wasn’t given so the participants made an assumption that the red car must have been going faster.
Davies, G. (2009). Estimating the speed of vehicles: the influence of stereotypes. Psychology, Crime & Law, 15 (4), 293-312