Low Emission Zone (1)

MQT on 2009-11-18
Session date: 
November 18, 2009
Question By: 
Mike Tuffrey
Liberal Democrats
Asked Of: 
The Mayor


How much in percentage terms would Phase 3 of the London low emission zone, if introduced in 2012 at the current boundary, reduce the number of people otherwise exposed in that year to concentrations of nitrogen dioxide (NO2) exceeding the EU annual limit value for NO2?


Answer for Low Emission Zone (1)

Answer for Low Emission Zone (1)

Answered By: 
The Mayor

We do not yet have detailed estimates of the reduction in population exposure to NO2 that would arise specifically from the proposed implementation of Phase 3 of the London Low Emission Zone in 2012. Further modelling and analysis is being undertaken to establish in more detail the impacts of the overall package of proposals and also specific individual measures. This will be available for the public consultation in 2010.

More general exposure modelling undertaken for my draft Air Quality Strategy, and set out in the Technical Appendix, suggests that the number of people expected to be exposed to annual mean NO2 concentrations above the EU limit value will fall from approximately 2.3m in 2006 to 0.7m in 2010 and 0.2m in 2015. This reflects committed schemes and proposals. The proposed LEZ Phase 3 in 2012 should lead to an incremental additional reduction over and above this base projection.

Phase 3 of the Low Emission Zone is principally designed to reduce harmful PM10 emissions and any reductions in NO2 achieved would be an incidental benefit.