عنوان مقاله [English]
In cost-benefit analysis and prioritization of safety countermeasure, it is necessary to estimate the social costs of accidents. One of the crash costs is the cost of users' time loss due to delays caused by accidents. In most studies, this factor has been ignored or considered only as a general estimate and no specific method has been considered for it. In this research, an analytical method has been proposed to calculate the cost of the delay caused by accident and the factors affecting it have been investigated. Another objective of this paper is to investigate and compare the cost of time loss to road users in different types of accidents according to the type of vehicles and roads. In a case study, the total time loss of users in various accidents is calculated. The results show that accidents on freeways-highways and especially heavy vehicle accidents cause the most wasted time for users. Total time loss in each injury or fatal accident on the freeway-highway, major road and secondary road is 2039.65, 700.39 and 95.90, respectively. Also, it is found that the share of freeway-highway, major and secondary roads from the total time lost in rural accidents is 43.69, 54.92 and 1.39 percent, respectively. The average time lost in each rural accident is 869 people - hour and its cost in 2016 is equal to 27.3 million Rials, which is about 0.6% of the total cost of rural accidents. The results show that although the cost of time lost in accidents on low-traffic roads can be neglected, it is still significant on expressways and highways.