Low emission zone

A Low-Emission Zone (LEZ) is a geographically defined area which seeks to restrict or deter access by specific polluting vehicles or only allow low emitting vehicles, such as regular or plug-in hybrids, or zero-emission vehicles, such as all-electric vehicles, with the aim of improving the air quality.

A Zero-Emission Zone (ZEZ) is a LEZ where only Zero-Emission Vehicles (ZEVs) are allowed. In such areas, all internal combustion engine vehicles are banned; this includes hybrid vehicles. Only all-electric vehicles are allowed in a ZEZ, along with walking and cycling and fully electric public transport vehicles, e.g. trams, electric buses etc.

The Singapore low emission zone is a traffic pollution charge scheme with the aim of reducing the tailpipe emissions of diesel-powered commercial vehicles in Singapore. Only vehicles that do not conform to higher emission standards are charged, the others may enter the controlled zone free of charge. The low emission zone started operating on 4 February 2008 with phased introduction of an increasingly stricter regime until 3 January 2012. The scheme is administered by the Transport for Singapore and the Land Transport Authority. Some of the criteria do include -


 * The first upgrades is in 2008.
 * Upgrade from Euro 3 to Euro 4 in 2012, that means those that are non-LEZ needs to be retired beginning January 2012
 * Another phase will be in December 2015, means that those Euro 3 buses needs to be phased out.