Signs o' the times: the traffic warnings that didn't work.

The article reports that scientists appears to apply to a popular class of traffic safety messages intended to reduce accidents by warning drivers about the inherent dangers of driving. Topics include driving on the freeway and traffic fatality message teamed up with Jonathan Hall, an economist at the University of Toronto; and messages to appear on dynamic message signs such as advising about road construction, traffic delays with warnings from Texas Department of Transportation.