Estimates are available for average traffic speeds in London and are derived from speed surveys conducted on a three-year cycle by Transport for London. These surveys measure the average speed of all traffic. Speeds by individual vehicle class such as cars are not available.
Average traffic speeds for the periods 1997–2000 and 2003–06 are as follows:
|Central area||Inner area||Outer area||All areas|
|Morning peak period|
|Daytime off-peak period|
|Evening peak period|
The 2003–06 cycle is not complete and the outer area survey information is not yet available.