Siemens Mobility has completed a retrofit upgrade of traffic signals for Transport for London (TfL), with the programme set to deliver energy and cost savings of over 75%, as well as significantly reducing the need for regular maintenance visits to replace and clean lamps.
Covering 161 crossings and junctions in London boroughs and ‘red routes’ across the north and northeast of the city, the project has seen existing incandescent traffic signals upgraded with LED central light source (CLS) technology, which consumes an average of 9W across a typical dim/bright cycle.
The retrofit upgrade has enabled the existing roadside infrastructure to be retained, while providing TfL with low maintenance, long-life, energy-efficient LED signals that provide improved visibility in all weather and lighting conditions. The programme was completed in three months.
Glynn Barton, TfL’s director of network management, said: “We’re responsible for traffic lights in London and they play a vital role in keeping people safe and keeping London moving. We’re always striving to improve our network, be more efficient and safer, and replacing the traditional bulbs in signals with LEDs has made a real difference.
“It’s making our infrastructure greener, more sustainable and cheaper to run. Furthermore, as LEDs are more visible, it is making our roads safer, which will help achieve our goal of no deaths or serious injuries on London’s roads by 2041 and encourage more people to walk or cycle.”
Siemens’ work has seen the retrofit of some 6,230 red, amber and green signals, 950 regulatory box signs and 1,840 push buttons. It follows a major retrofit programme in 2018, when the company retrofitted 25,000 older signals with new LED technology at over 900 sites.
