Pollution levels in 2020

MQT on 2014-03-19
Session date: 
March 19, 2014
Question By: 
Jenny Jones
City Hall Greens
Asked Of: 
The Mayor


What proportion of the road network do you currently expect to be over the legal nitrogen dioxide limits in 2020, outside the Congestion Charge zone and inside the zone, prior to the introduction of the Ultra Low Emission Zone?


Answer for Pollution levels in 2020

Answer for Pollution levels in 2020

Answered By: 
The Mayor

Given that exceedences of the legal limits stretch beyond the roadside, our analysis considers the total area of exceedence (not just the road network). Using the concentration modelling for the LAEI 2010 c.60 per cent of the congestion charging zone (CCZ) and c.2 per cent of the area outside CCZ is expected to exceed the NO2 annual mean limit value in 2020.

This underlines why it is correct for my proposed Ultra Low Emission Zone to initially focus on the congestion charging zone.