Meta-Combination of Persian Language Articles with the Focus on Traffic Calming Overview from 2008 to 2020

Urban road traffic calming measures, as an effective factor in increasing the level of safety of pedestrians and cyclists, limiting the speed of motor vehicles, and reducing casualties due to accidents. The present article analyzes and interprets Persian-language scientific-research articles in the period 2008-2020 by conducting a systematic review. The results showed that the application of accelerators and speed bumps on urban roads as a cross-sectional physical solution had a significant effect on reducing the speed of vehicles. In this regard, the comparison between the types of accelerators and speed bumps and control of their proper installation location can be evaluated in more detail in future studies. The results also showed that the change in pavement level a non-physical solution to reduce the speed to the allowable range is not very effective and needs to be combined with other solutions to achieve this, which requires new studies in this area. It should be noted that the use of simulation tools to measure the performance of the proposed solutions for combining relaxation tools can also be effective, and can be used by other researchers. Further-more, the results showed that previous studies have paid less attention to the effectiveness and analysis of the performance of relaxation devices such as deviant diagonal islands and traffic.