機動車事故一直是四歲以下幼童首要死因，有鑑於安全座椅能保障兒童乘車安全，我國早於九十一年就已訂定「四歲以下幼童乘車強制使用兒童安全座椅」的法規，並在九十三年九月一日實施。本研究以路邊調查研究方式，從民國九十三年三月到九十四年三月，針對臺北市立木柵動物園兩處停車場入口及大門入口路邊，針對車內有四歲以下幼童之車輛紀錄兒童安全座椅使用情況調查。本研究發現，在法規實施後，安全座椅的安裝率與使用率有顯著增加，但是隨之減少。根據本研究結果建議應該要有更有效的促進策略來提高安全座椅使用率，例如正向的強教育介入、法規介入及經濟介入等方式改善家長對使用安全座椅的態度與行為。

Motor vehicle accident injury is the leading cause of death of under 4 years old children in Taiwan. Many studies found that using child seat restraint was associated with low risk of child motor vehicle accident injury. For protecting infants and under 4 years old children as occupants of motor vehicles, Taiwan passed the law mandating the use of approved child passenger restraint devices for children younger than 4 years of age riding in a private passenger car in 2002, and implemented the law in 1 September 2004. To investigate the practical utility of child seat, we used the method of observational surveys. From March 2004 to March 2005, the well-trained observers recorded the use of child seat with younger 4 year children in a private passenger car at Taipei Zoo entrance and parking entrance. We compared the child seat installed rate and seated rate before the law was implemented and after. After the law was implemented, the child seat installed rate and seated rate of were higher than before. The highest rate was in September 2004, when the law was implemented at the time, then the rate was going down. According to the findings of this study, we suggest we should need more effective strategies to improve child seat use. For example, we should combine passive educational, enforced and economical interventions to change the attitudes and behaviors of young children's parents.