自動車の通行に伴う沿道の大気汚染の計測

The concentration of NO2 in air in Japan has been gradually reduced by means of stringent exhaust gas regulations. However, environmental standards are not still satisfied in some urban areas. In addition, concerns over NO2 emission increase from vehicles with latest exhaust gas after-treatment system have been pointed out by several researchers. In their reports the concentration is calculated using data from the air pollution monitoring station, or measured using actual vehicles on the test bed. In this report, measurement of air pollution has been carried out at road side and the concentration of NO2 has been measured directly. These data show a good agreement with the results stated above and it is necessary to continue measurement to monitor roadside air pollution status.