Environment Food and Rural Affairs written question – answered at on 21 November 2011.
To ask the Secretary of State for Environment, Food and Rural Affairs how many kilometres of road exceeded the limit value for nitrogen dioxide in the ambient air quality directive when the most recent measurements were taken.
Assessment of the number of kilometres of UK roads exceeding the limit value for nitrogen dioxide is made by mathematical modelling. For the 2010 calendar year the modelled road length that was assessed as exceeding the annual mean limit value was 4,280 km.
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