Document Type : Research article
Authors
1 Associate Professor of Environmental Engineering, Faculty of Environment, University of Tehran
2 Master of Student
Abstract
Background and Purpose:In recent years, the use of Bus Rapid Transit in Tehran has been taken into consideration and largely follows the satisfaction of the citizens of Tehran. Bus Rapid Transit (BRT) system reduce transport costs, increase speed and, ultimately, the comfort of the public. Therefore, in this research, the impact of the performance of BRT system is discussed.
Materials and methods:In order to achieve this goal, first, the traffic volume of vehicles in two scenarios by existence and nonexistence of BRT were obtained by the model; Eventually, after calculating the driving pattern by measuring in the field, estimating the fuel quality and calculating the type of fleet of the path, the amount of emissions of pollutants produced by each vehicle were obtained based on the model International Vehicle Emissions (IVE); and Eventually, the pollutants emissions from moving sources were compared in these two scenarios to achieve the effectiveness of the using BRT system.
Results: According to the results obtained from the route, the existence of BRT reduced carbon monoxide by 134.92 kg, volatile organic compounds by 5.13 kg, benzene by 0.48 kg, carbon dioxide by 4631.97 kg, nitric oxide by 0.37 kg and methane emissions by 6.86 kilograms. But it increased particles of less than 10 microns by 0.48 kg, nitrogen oxide by 0.8 kg and sulfur oxide emissions by 0.97 kg.
Conclusion: According to the obtained results, the driving pattern and the traffic volume are two important variables in the IVE. The emissions of carbon monoxide and contaminants of volatile organic compounds are released majority from light cars. At the end, the presence of BRT leads to a significant reduction in carbon dioxide emissions, which is the main source of greenhouse gas emissions.
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