| Title |
Analysis of Visual Distortion and Suggestion of Design Criteria at Curve Sections |
| Keywords |
curve sections;perceived curve radius;visual distortion;design criteria;geometric;곡선부;인지곡선반경;시각왜곡도;설계기법;기하구조 |
| Abstract |
Driver"s perceived curve radius is different from actual curve radius at curve sections. This is called visual distortion. It has effect on operation speed according to driver"s perception and finally bad effect on safety at curve sections. At present, however, there is no research on quantitatively analysis of visual distortion and no criteria for curve section design considering the visual distortion. Therefore, this study focus on finding degree of visual distortion and suggesting design criteria by visual distortion analysis. The process of this study is as below; First, a calculation model of perceived curve radius was developed by survey using computer simulation. In this model, a dependent variable is perceived curve radius and an independent variable is geometric factors. Second, degree of visual distortion was calculated from ratio of perceived curve radius to actual curve radius. Finally, design criteria were suggested through influencing factor analysis of visual distortion at curve sections. |