ABSTRACT:The railway construction utilizes several pieces of heavy equipment resulting in exhaust emissions such as pollution and greenhouse gas emissions (GHG). The release of emissions can affect the environment and human health. Although many previous studies have attempted to approximately estimate the amount of emissions, they did not consider the detailed processes of construction. The simulation model can be applied to improve this limitation and provides the ability to allocate resources and optimize the construction process. In addition, it can help to analyze alternative approaches to reduce emissions. This paper presents the development of simulation model to analyze the amount of exhaust emissions from the equipment usage in railway construction. It compares the amount of exhaust emissions from the situation in the railway construction process, which will demonstrate the effects on the relationship between the amount of exhaust emissions and the construction approach. As a result, this research provides an alternative method to manage exhaust emissions from the railway construction process and resource management.