The urban expressway is widely used to avoid traffic jams in highly-populated urban areas. However, vehicle exhaust can be easily transported to the neighboring area including residential buildings. In this study, we investigated the transport and penetration of vehicle exhaust into the nearby high-story residential building. Black carbon (BC) and lung deposited surface area (LDSA) concentrations were monitored every 1 min using an aethalometer (AE51, Magee) and a nanoparticle aerosol monitor (AeroTrak 9000, TSI), respectively. For comparison, the measurement was carried out in both the living room and balcony of the apartment from January 18 to January 25, 2016. The CO2 concentration indicated the presence of residents in the living room and transport of vehicle exhaust from the roadway in the balcony. Its diurnal variation showed a significant difference between weekdays and the weekend, implying the different time activity of residents and traffic volume. BC and LDSA concentrations were 1.4±1.5 μg/m3 and 53.9±45.0 μm2/cm3 indoors, and 1.9±1.0 μg/m3, 76.2±34.5 μm2/cm3 outdoors, respectively. The indoor to outdoor concentration ratios range from 0.6 to 0.8, indicating the significant influence of outdoor vehicle exhaust. The highest concentrations of BC and LDSA were observed in the morning rush hours, except for those indoors during the weekend. In particular, the outdoor effect is significant during the morning rush hours. Indoor air quality management is urgently needed for residents living near the urban expressway.

Abstract
1. 서 론
2. 연구방법
    2.1 측정위치 및 시기
    2.2 측정장비
3. 연구결과 및 고찰
    3.1 실내 공기질의 주간 변화
    3.2 실내외 CO2농도 및 온도의 일변화
    3.3 실내외 입자상 오염물질의 일변화
    3.4 주중과 주말의 시간대별 실내외 오염물질 농도의 변화
4. 결 론
References

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• 김창혁(국립환경과학원 대기환경연구과) | Chang Hyeok Kim (Climate & Air Quality Research Department, National Institute of Environmental Research)
• 노수진(한국과학기술연구원 미세먼지사업단) | Sujin Noh (Center for Particulate Air Pollution and Health, Korea Institute of Science and Technology)
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• 김경환(한국과학기술연구원 청정대기센터) | Kyung Hwan Kim (Clean Air Center, Korea Institute of Science and Technology)
• 우지나(한국과학기술연구원 청정대기센터) | Ji Na Woo (Clean Air Center, Korea Institute of Science and Technology)
• 배귀남(한국과학기술연구원 미세먼지사업단) | Gwi-Nam Bae (Center for Particulate Air Pollution and Health, Korea Institute of Science and Technology) Corresponding author