Optical illusion speed bumps aim to slow down London traffic

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The 2D design is painted in a such a way that it looks like there is a bump in the road, causing motorists to reduce their speed.

Transport for London (TfL) first trialled the idea three years ago, on the A117 in the borough of Newham. The 'virtual' speed bumps were also painted on Southwark Street in South London last summer.

A study found that these black and white road markings were very effective, reducing the speed of the traffic by up to 3mph, transport commissioner Mike Brown told a TfL board meeting last year.

"They are a cost-effective alternative to the traditional hump and are quick to install," Brown added.

TfL hopes to use the optical illusion speed bumps to bring down traffic speeds to below 20mph. It has recently rolled out the scheme to 45 undisclosed locations elsewhere in the city.

The local government body is only in charge of 5% of London's roads, but these are key routes which carry up to 30% of the city's traffic.

On other London roads, some local boroughs have also adopted the optical illusion road markings.

Nigel Hardy, TfL's head of sponsorship, road space management, told the Daily Mail: "We are working hard to create a road network which is free from death or serious injury.

"This Vision Zero approach to reducing road danger includes testing the effectiveness of 20mph limits on parts of Transport for London's road network.

"As part of these trials a number of different measures -- including new signs, road markings and painted speed bumps -- are being introduced to reduce traffic speeds.

"We will continue to try new speed reducing ideas to save lives and prevent injury on our roads."

Have you seen any of the 'virtual' speed bumps? Do you think it's a good idea?

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