Abstract
Effects of two types of stop signs on driving behaviors of private car and commercial vehicle drivers were examined. The subjects were 1,211 male and female Nigerians whose driving bahaviors were observed as they drove through a complex T junction. Trained observers recorded how far each driver conformed with the demands of standard traffic regulations. The results showed that (a) private car drivers conformed more to traffic regulations than did drivers of commercial vehicles, and (b) drivers who obey stop signs tended to make turn signals. Installation of more traffic signs on Nigerian roads and the education of the drivers (especially the commerical vehicle drivers) as to the specific demands of such traffic signs are advocated.
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