Climate change affects the occurrence of heat waves in Korea. Heat wave gives significant impacts not only to human health, but also adversely affects on traffic accidents both directly and indirectly. This study analyzed heat wave impacts on traffic accidents in summer time (JJA) from 2012 to 2017 timely. To consider some occupations work in earlier or later than regular working hour, 04~20h is set for this study. Generalized additive model is used to analyze the relation between the temperature and traffic accidents. The results showed that the traffic accidents in high temperature increases in 04~08h, 08~12h, and especially 18~20h. The percent difference for relative risk of traffic accidents is 2.34% (95% confidence interval: 1.140, 3.269) when the temperature increase by 1°C in 18~20h. The results of this study suggest some requirements for measures to prevent traffic accidents in the morning and evening hours with increasing temperatures.

Abstract
1. 서론
2. 연구자료 및 방법
    1) 연구자료
    2) 교통사고의 기초통계
    3) 통계적 분석방법
3. 연구 결과
    1) 기온과 교통사고의 관계
    2) 상대적 리스크의 정량화
4. 토의 및 결론
References

• 최서형(한국환경정책·평가연구원 기후에너지연구실) | Seo Hyung Choi (Division for Climate and Energy, Korea Environment Institute)
• 채여라(한국환경정책·평가연구원 기후에너지연구실) | Yeora Chae (Division for Climate and Energy, Korea Environment Institute)
• 박종철(한국환경정책·평가연구원 기후에너지연구실) | Jongchul Park (Division for Climate and Energy, Korea Environment Institute) Correspondence