Abstract:
The objective of the research is to present an approach to construct the pollution index model which is used to assess the in-site environmental pollutions of road construction activities. This pollution index model is constructed by focusing on weighted pollutions. The research methodology of analyzing important weight of pollutions involves analytical hierarchy process (AHP) which mainly emphasizes pairwise matrix comparison theory. This research limits the scope of study on the area of asphaltic concrete road construction projects. The study was done by reviewing related documents in order to categorize road construction activities, identifying sources of pollutions, collecting the data of environmental pollutions from sources of pollutions that occurred during construction phase, selecting major pollutions for constructing the pollution index model, analyzing important weight of pollutions for each construction activities, setting pollution magnitude approach based on related documents, and constructing pollution index from important weight of pollutions and pollution magnitude. The analyzing important weight of pollutions uses the pairwise matrix comparison theory approach. The data for the study was collected by distributing 44 questionnaires to project engineers related to government road construction projects. As a result of the study, 12 road construction activities were classified and there were 4 major pollution, which were particulate matter from construction engines, particulate matter from construction materials, noise pollutions from construction engines, and construction waste, that were related in constructing the pollution index model. The model is a suitable tool for assessing the importance of in-site environmental pollutions in road construction activities. In addition, the model shall assist and enhance the efficiency of environmental management of construction project in the future.