Abstract
It is reported that elder drivers have a high tendency to fail to notice the speed limit sign for their deteriorated visual ability. Especially, elder drivers would cause unintentional speeding in maximum speed decline intersections, when they failed to notice the lower speed limit sign compared to the former road section. Therefore, it is necessary to find some countermeasures for the speeding problem in maximum speed decline intersections. The purpose of this study is to understand the situation of speeding behavior and investigate the speeding reduction effect of advisory intelligent speed adaptation for elder drivers in this type of intersections. The probe data of 10 elderly and 10 nonelderly drivers living in the urban area of Toyota City, Japan are used to understand the change of speeding behavior with and without the provision of speeding alter in maximum speed decline intersections. The major finding suggests that the speeding rate decreased in 3 intersections, and it remained unchanged in two intersections inside the observed five intersections based on the trajectory of elder drivers.
