Transport for London (TfL) has announced new data that shows a substantial reduction in the number of collisions since the implementation of 20mph speed limits on key roads in London.

Monitoring of the 20mph schemes in London shows that since they were introduced, the number of collisions has reduced by 25% (from 406 to 304), and collisions resulting in death or serious injury have reduced by 25% (from 94 to 71), demonstrating the huge impact of lowering speeds across London. Vulnerable road users continue to be most at risk on London's roads, but since the 20mph speed limits have been introduced, collisions involving vulnerable road users have decreased by 36% (from 453 to 290), while collisions involving people walking have decreased by 63% (from 124 to 46). 

In March 2020, TfL introduced a 20mph speed limit on all its roads within the central London Congestion Charging zone as part of its Vision Zero commitment to eliminate death and serious injury on the capital's roads by 2041.  Currently over half of London's roads have a 20mph speed limit, of which almost 110km is on TfL's network. TfL is now working to lower speeds on 220km of its roads by 2024 in inner and outer London and plans to introduce a new 20mph speed limit on over 28km of roads in Camden, Islington, Hackney, Tower Hamlets and Haringey in March.    

The new speed limits have also made a large portion of London safer for people to live, work and commute, encouraging more Londoners out of their cars to walk, cycle and use public transport. More people now use healthier and more sustainable forms of travel which is vital to reducing congestion and air pollution.    

Will Norman, London's Walking & Cycling Commissioner, said: "I'm delighted to see that the introduction of 20mph speed limits is having such a positive impact on the number of collisions on London's roads; this forms an important part of the Mayor's Vision Zero plan. I look forward to the continued expansion of this programme on TfL roads and to working with colleagues in boroughs to make even more streets safer for Londoners. 

"Sadly more than 4,000 people are killed and seriously injured on London's roads every year. Lowering speeds is one of the most important things we can do to reduce road danger and make it easier and safer for people to walk, cycle and use public transport, creating a safer, greener London for everyone."