The effect of new road traffic laws on fatal and non-fatal injury rates in Iran

Background and aims: This study aimed to evaluate the effect of enforcement of new traffic laws on the fatal and non- fatal injury rates in Iran. Methods: In a longitudinal, interventional controlled trial study, all subjects with history of fatal and non-fatal injuries were studied. Their injuries were caused by six risky violations (unauthorized speed, illegal overtaking, red traffic light crossing, reverse gear movement in the highways, and vehicle arrestment due to two simultaneous violations) from June 2010 to November 2010 (as control) and from June 2011 to November 2011 (as case). Available forensic data were used and the outcome of new road traffic laws was analyzed. Results: The new traffic laws led to reduction of fatal and non-fatal road traffic injuries in urban and metropolitan roads after implementation, with a continuing trend during six months. Reduction of fatal and non-fatal road traffic injuries was higher for 20-29 years age group. The effect of new traffic laws on reduction of fatal and non-fatal injuries was 8.7% and 33.3%, respectively. Reduction of fatality and injury rate at crash scene, after six months of intervention, was 0.4 and 11.1 per 100,000 populations, respectively. Conclusion: The enforcement of the first phase of new traffic laws has reduced fatal and non-fatal rates of road traffic injuries in Iran. It seems that strict enforcement and amendment of new traffic regulations could further increase their efficiency.