抄録
At the present day there are growing number of the traffic accidents caused by dementia drivers. They don't know that they themselves are suffered from dementia, and that their abilities have been declining. One reason is that there is no way to evaluate their driving abilities, and so they can't recognize their abilities. This paper investigates an evaluation method of the driving ability for elderly drivers declined without subjective symptoms, and suggests a method to judge they are able to drive or not. Also, effectiveness of the new evaluation system based on this method is tested and evaluated.
