Research from Transport 2000, published 17 January 2007 shows that, if the Mayor is serious about London leading the way in reducing carbon dioxide emissions, he must cut traffic in outer London. Traffic levels over the past decade have grown in outer London, in some boroughs by as much as 15% - in sharp contrast to most inner London boroughs, which have reduced their traffic Transport for London (TfL) projections indicate that traffic in outer London could grow by 14% over the next decade and congestion by even more.