The effect of speed reducer on traffic calming in main and secondary arterial roads

The safety index and accident control are among important criteria evaluating the performance of transportation network, and speed management with the aim of achieving safety for traffic users is considered one of the main needs Considering the use of speed bumps as one of the important tools in traffic calming in Tehran, this research has compared the effect of speed bumps on traffic calming in main and secondary arterial roads. Method This research was applied terms of purpose and descriptive correlation in terms of nature the statistical population of this research was all drivers passing through the main and secondary arterial streets of Tehran. According to Morgan's table, the sample size was 384 people and available sampling was used, Pearson correlation tests and dependent t-test were used. The results of the t-test showed that speed bumps with signs warning signs have a significant effect on reducing the speed of vehicles in the main and secondary arterial roads. The average speed reduction in the distance of 300 meters from the main and secondary streets is 40.7 and 28.6 km/h, respectively. Also, the average speed reduction at a distance of 300 meters from the speed limit without signs and warning signs on the main secondary arterial streets was 41.9 and 24.9 km/h, respectively. The results of this research showed that in order to increase the effectiveness of speed bumps in main and secondary arterial streets, installing warning signs and revealing them increases the safety of traffic users.