Table 1 NO2 concentration according to on-site traffic density classified by direct observation and period of measurement
Traffic type | Period | Mean of NO2conc μg/m3 | Std. Dev. of NO2conc |
|---|---|---|---|
Low traffic density | 1 | 53 | 10 |
Low traffic density | 2 | 42 | 8 |
High traffic density | 1 | 71 | 10 |
High traffic density | 2 | 56 | 12 |