Tunnel traffic analysis by simulation at the peak traffic time of vehicles: case study (BRT route construction into the Tehran Resalat tunnel)

An attractive transportation system which is also efficient has to include series of factors which are fast, repeatable, predictable and comfortable, simultaneously. In this paper, it has been tried to study one of transportation system problems related to vehicles' traffic in Tehran specifically in one of the urban bottleneck in Resalat tunnel. The data of this study has been collected via Resalat tunnel's cognitive system and it has been tried to compare situation before Bus Rapid Transit (BRT) construction and after it. At first, in order to give an appropriate solution, all data have been converted to distribution functions by fitness test and then three different scenarios helped improving the situation, each scenario has been run 18 times by Taguchi test. In conclusion, the BRT route construction made an improvement of 30%. In order to ensure about accuracy of subject, all steps of before and after construction have been made by simulation software and compared with the real world. Simulation software result shows that after BRT route construction, expected traffic volume in terms of waiting time improved by 30% and it makes urban transportation system efficient regarding vehicles traffic and transportation speed.