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<p>Highways England monitor air quality using specialist equipment installed on the
Dartford Crossing and surrounding road network. The monthly data they produce forms
part of Highways England’s annual Air Quality Management Plan. This informs their
strategic assessments and policy.</p><p> </p><p>Highways England do not have monitoring
sites outside the Strategic Road Network in the area of the Crossing.</p><p> </p><p>Highways
England have also completed a Preliminary Environmental Assessment of the Lower Thames
Crossing (LTC) project including modelling of air quality.</p><p><strong> </strong></p><p>The
results of the modelling suggest that following the opening of LTC there will be no
perceptible change in pollutant concentrations along the A2 and on Bob Dunn Way. There
would be small improvements in pollutant concentrations along A225, A296, A226, and
A296. On the M25 corridor itself, there are predicted to be larger improvements in
air pollutant concentrations due to a reduction in congestion.</p><p> </p><p>As part
of the Development Consent Order application for LTC, Highways England are preparing
an Environmental Statement which will include a detailed air quality assessment, to
identify the effects and any mitigation measures required. The results of this detailed
assessment will be fully reported within the Environmental Statement.</p><p> </p>
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