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Department for Transport data used for low-traffic schemes revised down

The schemes restrict through-traffic in residential streets to make them quieter and safer.

02 October 2022

The Department for Transport has admitted road traffic figures were lower than previously published data which was used to justify low-traffic neighbourhoods (LTNs).

Designed to encourage cycling and walking by limiting driving in residential streets, LTNs were introduced by the Government in 2020 with £225 million in emergency funding.

They include segregated cycle lanes, wider pavements and closing roads to motor traffic.

A spokesperson for the Department for Transport said: “The figures used at the time were based on the most accurate data available.”

The admission comes after a review this week of the report used to justify the use of LTNs found the department had significantly over-counted the increase in traffic on residential streets between 2009 and 2019.

The minor-road traffic estimates report cited figures suggesting an almost 60% rise in London’s minor road traffic and a 72% increase on its smallest roads.

But there had been no increase over the decade, according to the review.

Previously published figures showed a 26% increase in minor road traffic across the whole country between 2009 and 2019, but on revision the increase was 10%, the report said.

The review said “areas for improvement” in how the estimates were reached have been implemented, including in the handling of GPS data.

“As a result, historic minor road traffic estimates have been revised and are lower than those previously published,” the report, published on Wednesday, said.

Transport for London confirmed it was reviewing the data update.

A spokesman said: “All schemes are judged on their individual merits and decisions about their implementation are based on a range of data, including local traffic counts… and collision statistics.”

Opponents claim LTNs make congestion worse, and they have been successful in convincing some local authorities to suspended or downgrade projects.

Tory-led Wandsworth Council said it had suspended its trial scheme after two weeks in September 2020 due to it causing “chaos” and “excessive amounts of pollution”.

But polling by YouGov for Greenpeace UK just a month later, which quizzed 2,027 British adults about their views on transport in their local area, found the majority of people (57%) supported low traffic neighbourhoods and only 16% opposed them.

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