‘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

  • Sustainable traffic management solutions
    February 2, 2012
    Siemens's commitment to innovation, energy and cost-saving sustainable solutions is reinforced at Traffex with the latest developments in Extra Low Voltage (ELV) technology, retrofit LED solutions and easy-access roadside equipment.
    Read More
  • Solar traffic signals from SRL
    March 6, 2023
    SRL Solar Plus product can be retrofitted to existing kit and is available to hire
    Read More
  • Refurbishing ageing VMS with new technology
    January 26, 2012
    Virginia DoT faced a challenge common to many highway authorities around the world: the need, in economically challenging times, to replace ageing variable message signs reaching the end of their operational life. For some 25 years now, since the mid 80s, Virginia Department of Transportation (VDoT), has deployed variable message signs (VMS) as part of its motorist information systems. Throughout the state there are still many old 'flip-disk' signs. Some of the companies that provided these electronic messa
    Read More
  • Integrating traffic management and tolling technologies
    April 25, 2013
    Jamie Surkont, head of road safety enforcement with Kapsch, outlines the company’s efforts to set up and align new traffic management business units with its more widely recognised tolling expertise The blurring of ITS applications’ edges brought about by systems’ increasing functionalities will ensure that many of the technologies which we have come to rely on for road and traffic management will find it increasingly difficult to exist or operate within tight market verticals. At the same time, systems man
    Read More

Highlighted Content