The ULEZ expansion to Greater London has resulted in a 4.8% reduction in nitrogen dioxide levels, improving air quality. Despite 99,000 fewer non-compliant vehicles, traffic levels have increased overall. Compliance rates for vehicles in outer London stand at 97.5% for cars and 90.7% for vans. Critics argue that the report's findings are exaggerated, as transport emissions were already declining due to a shift to cleaner vehicles. While the initiative shows positive air quality results, it hasn't deterred the increase in vehicle numbers across the city.
In the first year of operation, roadside NO2 concentrations in outer London were on average up to 4.8 percent lower than would have been expected without the London-wide Ulez expansion.
TfL sources said this had resulted in a substantial improvement in the capital's air quality, with the benefits rippling beyond London across the Home Counties.
However, the Ulez has not had any impact in reducing traffic levels in London. The number of vehicles has increased further since the scheme was expanded.
The Tories said the report was a fantasy based on guesses and assumptions, failing to highlight that transport emissions were already decreasing as Londoners switched to cleaner cars.
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