Multi-objective Optimization of Time—Cost—Environmental Impacts in Roadway Construction Projects: A Case Study in Vietnam

Greenhouse gas emissions (GHGs) have become and are becoming an important environmental issue in all industries worldwide. The construction industry has also begun to consider evaluating greenhouse gas emissions to assess the viability and prioritization of projects in a sustainable manner. The creation of emissions during the construction stage of roadway projects is mainly due to the use of fossil fuels for the operation of construction machinery. Therefore, the need for research on the efficiency of using equipment in the transport construction towards reducing the environmental impact is increasingly urgent. The main objective of this study is to analyze and propose solutions for the time - cost - GHGs emission optimization problem. The research process will go through four main parts as follows: The first is the literature review; Next is the development of analytical model; Then is solving the problem by a multi-objective optimization algorithm; The final is discussing on results and delivering the conclusions. Data from the National Highway No.20 through Lam Dong Province will be used as a case study.