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Practice Guidance 4

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This guidance provides relevant local air quality management policy and technical guidance on encouraging uptake of Retrofit Abatement Equipment. It provides information on methods for implementing, practical issues that have arisen and advice on appraising costs and air quality benefits.

Retrofit schemes are defined area(s) or locations where the most polluting of vehicles are encouraged after manufacture to install technologies to reduce its emissions. The aim is to reduce the emissions of more polluting vehicles being used by setting particular emission standards or criteria encouraging them to retrofit abatement equipment.

A range of systems exist for heavy duty vehicles that could abate dust (specifically Particulate Matter under 10 microns or PM10) and NOx (nitrogen oxides) emissions.

Some emission criteria are expressed in technology-neutral terms (i.e. a given Euro-standard must be achieved). Where this in the case, then retrofit can become a viable route to compliance rather than vehicle replacement.