2019 Volume 5 Issue 4 Pages A_1-A_7
Recently, some preliminary researches examining the speeding reduction effect of advisory intelligent speed adaptation on community roads have been implemented in Japan. However, there are seldom previous studies related to community roads without the posted speed limit. Since the number of this type of community roads in Japan is countless, speed reduction methods by infrastructures such as humps or constrictions are difficult. Therefore, the strategy of speeding reduction is very important. To fill this gap, this study examines the speeding reduction effect of advisory intelligent speed adaptation on community roads without posted speed limit considering vehicle movement and roadside environment. The probe data of 10 elderly and 10 nonelderly drivers living in the urban area of Toyota City, Japan are analyzed here. These probe data were collected through one long-term social experiment. The major finding suggests that 1) the advisory intelligent speed adaptation can reduce the speeding behavior of elderly drivers, compared to non-elderly drivers; 2) this reduction effect does not have the relation with the existence of walking road or residence in the roadside.
