TfL has begun installing more than 300 'Ultra Low Emission Zone' (ULEZ) warning signs across central London, in advance of the new zone starting next year.
The signs, which are being installed at the same locations as existing Congestion Charge signs, warn drivers to ensure their vehicle meets the new emission standards that will come into effect.
TfL has sent more than 2.5 million emails and contacted registered Congestion Charge users whose vehicles do not meet the ULEZ standards, to remind them the new zone begins on 8th April 2019.
It is also contacting other drivers it identifies in central London whose vehicles are not currently ULEZ-compliant.
Nick Fairholme, director of project and programme delivery at TfL, said: “We are committed to tackling the public health crisis that is London's toxic air.
“It affects all Londoners, causing 9,000 premature deaths every year and reducing the quality of life for thousands more.
“We're working hard to prepare Londoners for the ULEZ and to encourage them to opt for vehicles that emit fewer pollutants or walk, cycle or use public transport.
“We know that many people are aware, with more than 1.3 million checks of vehicles' compliance on our website.
“These new signs will be a physical reminder that the ULEZ is coming, but we won't stop there.
“We've contacted registered Congestion Charge users and are currently contacting other vehicle owners who drive in central London.”