My Transport Strategy acknowledges the importance of motorcycles in London. However, the Ultra Low Emission Zone (ULEZ) is about reducing emissions – specifically NOx and PM – from vehicles and is not a direct congestion management scheme. Motorcycles can be highly polluting on an individual basis and this is why motorcycles that do not meet the Euro 3 standard are included in the ULEZ. In terms of congestion, while motorcycles can be more space efficient when stationary they require a lot of space when accelerating and are not able to carry more than two people.