Siemens Mobility Retrofit

Delivering cost, energy and carbon savings
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Traffic Signal Lamp Retrofit Programmes

Delivering cost, energy and carbon savings

The Siemens Mobility LED retrofit solution provides an extremely cost-effective way to significantly reduce the ongoing cost of operating traffic signals, reduce energy consumption and future proof traffic signal equipment from future lamp obsolescence issues. 

LED Retrofit brochure

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Siemens Mobility can help: From design and deliver to install and maintain

Did you know that...

annually, the new LED signals from East Sussex contributed to a CO2 saving of more than

0 tonnes

Unrivalled experience

We can support your upgrade journey

Siemens Mobility has been involved in upgrade programmes for a number of Local Authorities across the UK, working closely with them at every stage of the process from design and delivery through to installation and maintenance. Where required, we have also been able to provide support in identifying and securing the most appropriate funding sources, with interest-free Government finance available through the Salix scheme to help the public sector improve energy efficiency and make the efficiency gains of LED technology even more affordable.

Siemens Mobility Limited completes low energy traffic signals upgrade in London

Siemens Mobility Limited 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.

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 and not only that but as LEDs are more visible it is making our roads safer
Glynn Barton, Director of Network Management, Transport for London

At the heart of many Local Authority upgrade programmes is Siemens' LV and retrofit system, which incorporates LED central light source (CLS) technology.  The system delivers low-power consumption, low maintenance and long-life performance, whilst offering improved visibility in all weather and lighting conditions.


Transport for Greater Manchester (TfGM) commissioned the largest and most ambitious traffic signalling upgrade programme ever undertaken in the UK, covering the replacement of a total of 52,000 traditional traffic signal bulbs with Helios LED aspects across more than 1,800 sites.  Building on the success of this programme, further upgrade work took place, with traditional wait indicator lamps being replaced with LED lights at more than 500 traffic signalling sites.


In recent years, as part of an ongoing programme, Transport for London (TfL) has also replaced over 26,800 individual signal aspects and upgraded many pedestrian wait indicators with Helios Retrofit solutions.


Similarly, East Sussex County Council used a grant from the Salix Carbon Reduction fund together with internal energy reduction funding, to replace 1,500 signal heads across the country with new Siemens LED units.

Retrofit solutions are a cost-effective way to significantly reduce energy bills and future-proof traffic signal installations against the expected sales ban of incandescent traffic signal bulbs in the coming years.
Keith Manston, Head of ITS Product Management, Siemens Mobility Limited

Cost efficient, sustainable solution

Combining low operating and maintenance costs together with significantly reduced energy consumption, our retrofit system provides a long-term, cost efficient and environmentally sound solution.  Incorporating LED central light source (CLS) technology, the solution has formed the basis of many upgrade programmes, delivering:

  • low power consumption (over 75% savings in carbon and energy)
  • low maintenance
  • long-life performance
  • improved visibility in all weather and lighting conditions
  • enables existing roadside infrastructure to be retained

The retrofit process is fast and efficient, with disruptive works kept to a minimum. Our experienced installation teams simply replace each existing signal head door and incandescent optical assembly with a new LED CLS door and then upgrade the system controller.  This ensures that an Authority's investment in the majority of its installed signal equipment is retained, minimising waste and disposal issues and so further enhancing the carbon savings achieved by the retrofit programme.



Modern technology, proven in projects

Transport for London: London Boroughs and Red Routes across the North and North East of London

  • £1.3 million contract, completed in just 3 months
  • Covering 161 crossings and junctions across the city
  • 6,230 red, amber and green signals, 950 regulatory box signs and 1,840 push buttons have been retrofitted

The existing incandescent traffic signals were upgraded with LED central Light source (CLS) technology, which consumes an average of just 9W across a typical dim/bright cycle, delivering carbon and energy savings of over 75%.  In the longer term, this technology will provide further carbon savings as a result of the reduced requirement for maintenance visits to regularly replace and clean traditonal lamps.


Ongoing retrofit programme with Transport for London

  • Over 26,800 signal aspects replaced at more than 900 sites
  • With our controllers across 300 sites, the programme is delivering annual energy and maintenance savings of over £300,000

As part of a rolling programme for TfL, at more than 900 sites we replaced over 26,800 individual aspects, together with many pedestrian wait indicators, with Helios technology.

Transport for Greater Manchester

52,000 incandescent signal bulbs were upgraded with Helios LED aspects across 1,800 sites, resulting in:

  • an annual reduction in maintenance costs of c.£600,000
  • monthly energy consumption reduced from 1,009MwHr to under 400MwHr
  • around 30,000 standard bulbs saved per year due to longer life LED units

Building on the success of this programme, further upgrade work took place, with traditional wait indicator lamps being replaced with LED units at more than 500 sites.  In the first two years after completion, the programme had saved over £1 million.

To date the programme has saved over £1,000,000. Over the lifetime of the new lights, predicted savings are in excess of £5m in electricity charges, £1.5m of maintenance charges, and 37,000 tonnes of CO2. It will remove the need to replace over 400,000 lamps. The project is a leading example of collaborative working to successfully deliver a programme to directly improve sustainability in the highway environment.
David Bland, TfGM Highways Network Development

East Sussex County Council

East Sussex County Council used a grant from the Salix Carbon Reduction fund together with internal energy reduction funding, to commission this work.

  • 1,500 traditional halogen signal heads replaced with LED technology
  • Traffic controllers modified to allow for lamp monitoring of the new LED aspects
  • Contributing to more than 195 tonnes of carbon dioxide savings each year


Funded by Salix, the scheme covers a mix of 64 junctions and crossing sites with some 400 incandescent traffic lamps replaced with new Helios LED LV Optic LED units.  The scheme is forecast to deliver:

  • 78% reduction in CO2 (equating to 66 tonnes) per year
  • £25,000 annual cost saving through reduced electricity consumption and maintenance savings


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The complete solution - project payback

Although each project is unique and funded slightly differently, they have all benefitted from a reduced payback period thanks to cost-efficiencies both in the cost of the equipment and throughout the installation process.


Projects have also benefited from Salix Finance, which provides interest-free Government funding for public sector improvement initiatives that deliver energy efficiencies, carbon emission reductions and lower energy bills.  Based on a five-year payback (eight years in Scotland) funding is available for up to 50% of the project value and for the traffic signal retrofit programmes, payback is calculated both on power and maintenance savings.


Working closely with the Local Authority to identify and quantify the savings that a retrofit scheme will deliver, our consultancy team is able to offer guidance and support throughout the funding process, including the options of workig with Salix and of developing a tailored, project-specific solution through our own Financal Services division, SFS.

Contact our experts

Get in touch with our experts now to help guide you through the process of upgrading your traffic network to realise the operational, performance, environmental and cost benefits that come with Siemens Retrofit programmes.

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