Transport for London says that its entire 9,000-strong fleet of buses now meet or exceed Euro VI emissions standards.
The change will allow the overhaul of the neighbouring Tube station and surrounding area to move to the next phase
Almost £1million has been awarded to 14 boroughs who will create the spaces over the coming months.
A new dashboard making road accident statistics easier to understand is now available on the Transport for London website.
The test Tube trains made a return trip through the 3.2km tunnels linking Kennington to the new Nine Elms and Battersea stations.