PURPOSES : This study is to evaluate environmental improvement effects of underground road project, as a case study of ‘Seobu’underground expressway project in Korea. METHODS : The environmental improvement effects of underground road construction were classified into tree sector in this study – air quality, noise, and thermal environment. To evaluate these effects, this study collected and divided environment dataset into before, during, and after ‘Seobu’underground expressway construction, and compared the change of values with entire city. In addition, the quantification method of environmental improvement effects was suggested based on the literature review. RESULTS : The result of this study indicates that there exist significant improvement effects of urban environment after the construction of ‘Seobu’underground expressway. Specifically, the concentration of particulate matters (PM10) and daytime/nighttime noise, and land surface temperature (LST) were improved along the expressway. In addition, the overall environmental benefit of ‘Seobu’ underground expressway was estimated to 1.15 billion won per year. CONCLUSIONS : To promote systematic and consistent underground road project, it is required to establish legislative system for evalauting and supporting urban improvement effects.

1. 서론
2. 선행 연구 고찰
3. 연구 방법
    3.1. 연구 대상지
    3.2. 데이터 수집 및 가공
    3.3. 연구 방법
4. 연구 결과
    4.1. 기초 분석
    4.2. 사업 개선 효과 – 대기질
    4.3. 사업 개선 효과 – 소음
    4.4. 사업 개선 효과 – 지표면 온도
    4.5. 항목별 편익 산정
5. 토의 및 결론

• 김민준(정회원 · 국토연구원 국토인프라연구본부 부연구위원) | Kim Minjun (Associate Research Fellow Korea Research Institute of Human Settlements, 5, Gukchaegyeonguwon-ro, Sejong-si, 30147, Korea) 교신저자