Skip to content

Practice Guidance 3

Related Links

Tell us if you want any of the documents on this page in an alternative format.
This guidance provides relevant local air quality management policy and technical guidance on encouraging uptake of Low Emission Vehicles. It provides information on methods for implementing, practical issues that have arisen and advice on appraising costs and air quality benefits.

Low Emission Vehicle (LEV) schemes are defined areas or locations where the most polluting of vehicles are restricted, deterred or discouraged from access and use.  The aim is to improve air quality in a particular area by reducing the number of more polluting vehicles being used by setting particular emission standards or criteria.

A supplementary benefit of LEV schemes may be to reduce CO2 (carbon dioxide) emissions in addition to emissions of local air pollutants. One useful definition of an LEV is a vehicle with emissions better than the Euro 4/IV standard and with CO2 emissions better than 140g/km (grams per kilometre).