‘One-Watt’ traffic signals from Siemens

Small is big news on the Siemens stand as the company unveils its ultra-low consumption One-Watt technology for traffic lights. The move from incandescent bulbs to 230V LED lamp heads had seen an enormous reduction in power consumption (down from 60Watts per head to around 15W) but means the load resistors and switching elements in the signal units are often the biggest energy consumers.
April 6, 2016 Read time: 2 mins

Small is big news on the 189 Siemens stand as the company unveils its ultra-low consumption One-Watt technology for traffic lights. The move from incandescent bulbs to 230V LED lamp heads had seen an enormous reduction in power consumption (down from 60Watts per head to around 15W) but means the load resistors and switching elements in the signal units are often the biggest energy consumers.

With One-watt technology the use of 24V LEDs and digital driver modules has eliminated the need for load resistors and switching elements and means a complete signal head may require only one or two Watts to operate.

This provides huge benefits as a large city like Berlin can avoid some 2,000 tons of carbon emissions and save €500,000 in energy costs every year.

In cities still using conventional filament bulbs in their traffic lights, the potential savings are significantly higher and according to Siemens One-Watt technology traffic signals will typically pay for themselves in less than five years.

Furthermore, Siemens said its LED signals retain full light intensity and also reduce service costs and it monitors voltage, current and the luminosity of the LED units, adding that may become possible to predict when LED units will fail so enable preventative maintenance.

The first One-Watt pilot projects are running in Bolzano, Italy and in Bietigheim-Bissingen near Stuttgart in Southern Germany.

For more information on companies in this article

Related Content

  • GridMatrix goes back to the future in New York City
    September 25, 2023
    Legacy traffic management infrastructure doesn’t have to be a marker of the past: software upgrades can bring it into the present in a cost-effective and timely way, says Gordon Feller
    Read More
  • Siemens is a technology supplier for new satellite-based toll system in France
    May 30, 2012
    Siemens has received orders, valued at nearly US$63 million from Eurotoll and Total, two of the largest French electronic toll onboard units issuers, to supply technology for the new French toll collection system. The equipment comprises onboard units for the vehicles as well as the electronic detection system. The orders are part of the Ecotaxe project which will see the introduction of mileage-based taxation on French national roads for trucks weighing 3.5 tons and more.
    Read More
  • Parifex speed cameras: picture perfect
    September 30, 2020
    From speed cameras to smart cities, image processing and AI – Parifex is not short of ambition. Nathalie Deguen tells Adam Hill where the French company is heading next
    Read More
  • Robin Chase interview: Heaven and hell
    June 13, 2018
    A shared vision - or even much of a conversation at all - about what a better mobility balance looks like has been lacking…until now. Andrew Stone speaks to Zipcar founder Robin Chase about fairness – and the importance of not demonising cars
    Read More

Highlighted Content