Figure 1.

Figure 2.

Figure 3.

Figure 4.
![Measurement area plan [Google maps]](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/64706f1783f1392090d69759/j_acee-2019-014_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKPGM3F46V%2F20251217%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251217T034500Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEKn%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDGV1LWNlbnRyYWwtMSJHMEUCIQDOw%2BWCBe4fvKcxFiWhiCLttbQDJ86fuaztc6dQmJQ4WAIgPHRk9ccfZ2iWZzj3R%2BuoEflB%2FvmC24eddqbk9FL8rnIqvAUIchACGgw5NjMxMzQyODk5NDAiDBSUedTKbO6oGgaFJiqZBYA%2BcQei523hqq1%2FW3yPRGdJodA7vMBp1PAN8Wk35VE%2BZ%2BOu33aIrcJxRW%2BwQnUREDFgNK7QE5mujL5OYlaVmAIumA%2FESyPIPavNSeNq6m6rhrjxLS%2B05ACjiZW5bGu8X88m6f%2BXTXAgtvT6XMYYYdnwJOasxsMUCizpij2npPB3iEmDK2%2Bb%2F1UV1qPVwA66UCZ20KBDVS035sNp0%2BPi%2FHg1XylvSdqfZcfahjRfXIbqX72X0Ff5Ik%2FHeLd6WVQSJhf8VdrKiOO0A0hxsbEYV%2BuGO%2BtmP%2B76OWrEhpGFK7wBWJUUFcYfMSgGFzwBGHp3l%2BHBKHGgYdN%2BBqmDuIGXE%2FgZN%2FXb4GBDjjT%2F15dr7iSpam3UCn8NNnZ3SMSL7OFm63PRJmMAgELlUOOP5qL6wIMQwd7ZGQ%2BW9%2FiLnPBomysVEM%2FMrVhKeGlGX4zj78bnMGifwaT%2BXKfAnuIKEDV1%2FQAOvyLZfoc%2BpgcLqJnwtRSR9313x65F3vla990ZV11841wfLZS7IJNReW7cEfHfLzKJo7ejiCSliybv%2B5bjXbMhIen2IhR%2B03YjN2ZaFYmDbSG6hybH%2BiddHwHZXX9z9%2BRJM8ELD3XBtKlo5JQI8wksrf5hw86xWWLrhvsBDYzQRMp%2FLH%2BUK12MlBPWz16cfZwXvhT5poE6V%2FEFWEFer0Rg%2FJx6DgUkZbDSDvmUetWRPmidFLcwAALi8DkOg8UxV0LlTdAFUjZFliu56%2BZSjGpib%2F%2F4epW%2FYstLhr0w2YdjTHrV6zWrfoYaqk%2FG%2F0YMbBb%2FDZtx8WiDopgFRNhyII7CnY9v0xMOboZKml19xQ5sfU7sEu7RMoA18R9islnb31u0eW0f88nkwjYMirfbzK%2Fb%2BstJsdmDE4KbMK2JiMoGOrEBliaC%2BklE0rbr2xHw0v2FK5XTXn8fCzOR0ZSaGBjvgDSIQmaeNk0bgz9fOXXUKaeKywLXhlB4AnL5%2FGbcCuFgle3LKDZnEMF4hlTXNjRV8Tr2vvm8%2B0qUkxJld9v0djSOnQN6gL267q%2FSjpwd92obbWgB7pNhp%2BDVkLG%2FAysuIDTlnjpmS75Lkd2By1bWNwjl%2BUm2HQhu%2FPsE2zMlHnNk7P%2FY8NqCrFMaH4lktizgLRY4&X-Amz-Signature=4b80e39390c7e8d1aac3641e34c528ae16a06110bc76fe983cebd8ee5ba4884c&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 5.

Average 5 months NOx concentrations measured by OPSIS system and WIOŚ station, the difference between them (local sources) and share of local sources in overall concentration
| OPSIS measurement | WIOŚ station (background) | Local sources | Share of local sources | |
|---|---|---|---|---|
| µg/m3 | µg/m3 | µg/m3 | % | |
| group 1 | 84 | 18 | 66 | 79 |
| group 2 | 85 | 24 | 61 | 72 |
| Difference: 7% |
Maximum and average values of NO2 concentrations in particular months, µg/m3
| month: | February | March | April | May | June | 5 months | |
|---|---|---|---|---|---|---|---|
| WIOŚ | maximum | 99 | 100 | 93 | 77 | 87 | 100 |
| OPSIS | maximum | 130 | 132 | 120 | 107 | 104 | 132 |
| WIOŚ | average | 34 | 29 | 19 | 20 | 17 | 24 |
| OPSIS | average | 89 | 87 | 83 | 83 | 81 | 85 |
j_acee-2019-014_tab_003
| Earthworks | 5.5–50 |
| Road roller | 40 |
| Road roller/sweeper | 38 |
| Asphalt sawing | 12 |
| Asphalt smashing | 139 |
| Plate compactor | 14 |
| Asphalting | 98 |