2021 Volume 7 Issue 2 Pages A_38-A_43
In case of level 3 autonomous car which has continuously spread now, a warning for driving relay is raised before the system is released and a driver is obliged to respond to it. Therefore, it is believed to be an important problem on security to understand the release conditions. In this study, clarification of the release conditions as described above was pursued by grasping how a state of traffic lane dividing lines had impacts on detection performance of lane departure warning system. Based on a driving experiment conducted on a test course equipped with traffic lane dividing lines that imitated a deteriorated state in a simulated manner, we measured detectability of the traffic lane dividing lines as well as luminance of the traffic lane dividing lines and the road surface. From results of the experiment data analysis, it has been suggested that difference in luminance between traffic lane dividing lines and road surface is a factor to affect detection performance which could be reduced when the difference in luminance falls down to a certain value or less in a case that the traffic lane dividing lines have deteriorated to some extent.