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20 mph speed limits on London's roads (4)

Questions to the Mayor of London – answered on 16th March 2020.

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Photo of Caroline Russell Caroline Russell Green

What percentage, and how many kilometres of the Transport for London Road Network (TLRN) had a 20 mph speed limit when you entered office, and what percentage will have this limit by May 2020?

Photo of Sadiq Khan Sadiq Khan Mayor of London

In June 2016 approximately two per cent of roads operated by Transport for London (TfL) had a 20mph speed limit, which equates to 18km of carriageway*.

Currently, as of March 2020, approximately seven per cent of TfL’s roads operate with a 20mph speed limit, which equates to 62km of carriageway*.  This number includes early delivery of my Vision Zero commitment to introduce 20mph on all TfL roads in central London, by May 2020 (

I do not expect this to change before May 2020.

*the lengths quoted refer to the carriageway length in each direction