自動車では駐車の時間が大半を占めるため，車載用LIBでは保存劣化の影響を把握する必要があり，保存劣化を高精度に評価することが必要である．保存試験法 としては，満充電等の既定の値に充電したのち，一定温度の恒温槽内で保存，一定期間ごとに性能評価を行うことが一般的である．本研究では保存劣化の高精度な評価に向けて，保存試験手法における性能評価試験の影響および性能評価時の容量測定結果について検討を行った．

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This study applies a counterfactual analysis to assess the reduction in road traffic deaths and disability-adjusted life years (DALYs) if all vehicles in the Association of Southeast Asian Nations (ASEAN) were designed to provide crash protection equivalent to that of the best vehicle safety design in their class, and if all road users adhere to safety best practices. We estimated the current availability and effectiveness of vehicle safety technologies related to the priority United Nations (UN) vehicle safety standards, using protective devices (occupant restraints and helmets), and emerging technologies (autonomous emergency braking system (AEBS), lane keeping assistance (LKA), and speed limitation). Results indicate that if all ASEAN vehicles comply with the priority UN vehicle safety standards and if all road users appropriately wear protective devices, it would save 34,373 lives and reduce health loss by 2.5 million DALYs. Collision avoidance systems would provide additional reductions estimated at 6,977 lives saved and 626,564 DALYs averted by the AEBS and 6,100 fewer deaths and 394,656 fewer DALYs by the LKA. Speed limitation would have the largest additional benefit in the ASEAN region, estimated at 21,394 lives saved and 1,382,530 fewer DALYs. The overall effect of all investigated technologies is estimated at 59% less road traffic deaths and DALYs in the ASEAN region. Regulating vehicle safety technologies and encouraging the use of personal protection devices are among the best approaches toward zero traffic deaths.

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2023年4月3日～6日にパシフィコ横浜ノースにて自動車安全技術（ESV）国際会議が日本で20年ぶりに開催された．開催準備においては新型コロナウイルス感染症の影響を多大に受けたが，最終的には従前同様に国内外からの数多くの参加者を迎えて開催を成功に収めることができた．なお，当研究所は本会議の事務局を担い会議の内容をよく理解できたことから，本稿では事務局の視点や経験なども加えて開催概要について分かりやすく解説した．

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