Investigating the effect of individual characteristics and attitudes on the frequency of speeding: A case study of Tehran

Speeding -as the most frequent driving violation- has been the cause of 21% accidents in the first three months of 1398 in Tehran. Over speeding behavior has roots in drivers’ individual attitudes which has not been studied enough for drivers in Tehran. This study examined the association between speeding violation frequency and drivers' attributes including socioeconomic characteristics and their attitudes toward driving. A Zero-inflated negative binomial regression model was built using a cohort of 470 adult drivers data the number of tickets they received in three month periods and their individual attributes. Results show that hours of physical activity and exercise per week, some perceptions such as "other drivers move slowly" and "Traffic violations are an immoral act" affect the occurrence and the frequency of speeding. Besides, having delays in most trips that require driving, less than five years of driving experience and having vehicle body insurance directly affect the frequency of speeding. Based on the results, it can be concluded that reviewing the rules can be effective in reducing speeding violations, for instance, adding some penalties in body insurance contracts for the number of speeding violations. Also, education courses for raising public awareness toward violations can be effective, especially for drivers with more experiences and speeding violations.