Western Extension removal

MQT on 2010-09-15
Session date: 
September 15, 2010
Question By: 
Mike Tuffrey
Liberal Democrats
Asked Of: 
The Mayor


Campaigners against the removal of the Western Extension Zone have suggested that if the WEZ is removed each of the following is expected to occur: a) the PM10 daily limit value would be breached in 2011 on pavements frequented by the public; b) the PM10 daily limit value would be exceeded in some places in 2011 having been attained at them in 2010; c) and it would make air pollution worse in some places frequented by the public? What is your response to these suggestions?


Answer for Western Extension removal

Answer for Western Extension removal

Answered By: 
The Mayor

a) Analysis of the air quality impacts of removal of the WEZ, taking into account the modelling methodology and concentrations contours which lie close to the kerb (but excludes the road carriageway), leads to the conclusion that the EU limit values are expected to be met within the WEZ, both with and without the WEZ scheme, in 2011.

b) Removal of the WEZ has been assessed in 2011 in terms of changes to emissions of NOx and PM10 as described within the consultation documents. This describes predicted emissions increases within WEZ of between 2 to 3% for NOx, and 3 to 4% for PM10, in 2011. However, these increases are not expected to have any significant impact on air quality concentrations or lead to exceedances of the EU Limit Values in the areas.

c) The proposed removal of the WEZ would increase emissions within the zone by a small amount but without a significant impact on air pollutant concentrations. Furthermore, my draft Air Quality Strategy proposes a range of policies to reduce air emissions from various sectors, including road transport. These measures include a taxi age policy, improving the bus fleet, and the introduction of LEZ phase 3, which will further reduce emissions of PM10 within the WEZ area, as well as more widely.