Traffic levels have fallen since the coronavirus lockdown began in March. This has led to levels of the pollutant nitrogen dioxide falling by more than half in the city centre.
These three reports provide more detail.
- Covid-19 lockdown effects on air quality [Air Quality England] – A technical report analysing changes in concentrations of nitrous oxides and nitrogen dioxide.
- Covid-19 Initial Impacts [PDF, Greater Cambridge Partnership] – A collection of data on traffic, parking, air quality, bus services and journey times.
- Air quality in Cambridge: Trends related to the Covid-19 lockdown [PDF, 0.1MB] – A note discussing how the air quality data was analysed for inclusion in the Greater Cambridge report.