Factor Analysis and Safety Evaluation Model of Road Geometrical Structure using Quantification Theory

In this paper, we are carried out a surveying for road image to find road and environmental factors that drivers have felt on three-dimension combined alignments with many risk using 3D computer graphics. Be based on surveyed data, we found the effect factor of road safety using canonical discriminant and canonical correlation analysis of quantification theory II, and detected the causal relation between geometrical structure as finding a driver's recognition by geometric change by road safety model of quantification theory I in three-dimensional combined alignments. As the result, for construct safety road, we found that have to consider not only the quantitative factor as road geometrical structure, but also the qualitative factor as human factors in road design, and we think that design safety and comfort road as making a road design standard considering human factor.