APPLICATION OF FUZZY-AHP IN GIS-BASED ANALYSIS FOR ROAD SAFETY INDEX MEASUREMENT

Maintaining the safety of road users is an absolute necessity. Therefore, the road must be safe, and road infrastructure is one of the most important aspects. Several studies suggested that different road infrastructures had different impacts on road safety. Therefore, this study was conducted with two (2) objectives, which are (i) to determine the degree of importance of factors influencing road safety and (ii) to derive the road safety index. This study proposed the application of Spatial-Multicriteria Decision Analysis, where Fuzzy-AHP was chosen as the technique to deal with uncertainty in criterion weighing. Findings revealed that the criteria with the highest degree of importance is Road Marking, with a weightage of 0.392, while the least important is Street Lighting, with a weightage of 0.028. The criterion weightage was then used in GIS proximity analysis to measure the safety index, which revealed that most roads in the study area have high and very high safety indexes. The indices were verified by interviews with an expert and site verification to see if the calculated indices were accurate. Thus, this study revealed the possibility of using Fuzzy-AHP and GIS methods in measuring safety index, which can be applied in the future.