事故データおよび頭部有限要素モデルを用いた高齢自転車乗員事故様態の解明

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  • Clarification of Traffic Accidents involving Elderly Cyclistsusing Actual Traffic Accident Data and a Finite Element Head Model
  • ジコ データ オヨビ トウブ ユウゲン ヨウソ モデル オ モチイタ コウレイ ジテンシャ ジョウイン ジコ ヨウタイ ノ カイメイ

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The number of fatal elderly cyclists was extremely large, where a new human interface technology would be effective to avoid such accidents. For clarifying the possible usage of a new technology, we investigated the specific features of elderly cyclists in real-world traffic accidents. The results indicated the lack of confirming safe conditions of cyclists were the most common causes of bicycle accidents with increasing cyclists' age. In fatal cyclists at intersections without traffic lights, the rate of cyclists aged 75 or over was significantly higher than that of cyclists aged 59 or younger. Those results suggest a new technology, e.g., alerting system, could be helpful for elderly cyclists to ride on bicycles safely. Additionally, the real-world accident investigation clarified that fatal or seriously injured cyclist by head impacts against roads were more common at low vehicle speeds. Therefore, we also investigated the types of possible head injuries in cyclists aged 65 or over, using a finite element head model. The results estimated skull fractures and brain injuries that could occur by head impacts against roads for a cyclist aged 65 or over. The detailed head injury information through a new technology could be useful to provide more appropriate medical treatment.

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