Walking in Abingdon this afternoon my wife commented how bad the pollution from traffic was down the Vineyard.
The air pollution used to be concentrated in the town centre shopping streets before the Abingdon Integrated Transport Strategy (AbITS), implemented in 2006, started holding traffic outside the town centre in roads like the Vineyard and Ock Street.
On investigation I found that the VWHDC council monitors levels of pollutants around the town centre. Monitoring tubes are fixed to lamp posts. They are exposed for a month at a time and sent to the laboratory for analysis and reporting.
One monitoring tube is in the Vineyard, and like most of the tubes around Abingdon town centre it shows a slowly decreasing trend in nitrogen dioxide levels.
This data is available at https://oxfordshire.air-quality.info.