Cycle lane improved air quality on Upper Thames Street

PM10 largely copmrises non-exhaust emissions . You aren't going to get much brake dust and tyre wear from vehicles that aren't moving, so it's no surprise that queueing traffic generated by halving the size of the road has reduced the PM10 matter. 

 

Are the NOx / CO2 numbers also available?

Looks even more impressive if you look at a chart going back to 2010