Abstract: The traffic accident will harm someone’s legal properties and right of healthy．According to article 302 of contract law，the carrier has legal high duty to care for passagers’safety；otherwise，the passagers must hold the liability for the damages arising from the injury or death of passagers by breaching the lesal duty to care for the passagers．The passagers should chose the lowest opportunity cost to sue it and the law should try to it’s best to deduce the pantiff’S cost to sue it．

Key words: Lraffic accident；torts；the general duty of caring for passagers safety；the high duty of caring fol passagem&rsquo, safety

摘要： 公路客运合同中发生的道路交通事故，从法律上讲，是对他人人身健康权和物的所有权的侵害，《中华人民共和国合同法》第302条的法律性质，是对承运人科以保障乘客人身安全的法定义务，是以违反保护他人权利的法律规定的形态为表现形式的侵权行为。受害人，应当选择向求偿机会成本最小的主体主张权利，国家法律应当极力降低当事人选择求偿权的机会成本。

关键词: 客运合同 , 交通事故 , 侵权行为 , 一般安全注意义务 , 高度安全注意义务