More than 100 years ago - on August 5, 1914 - the first electric traffic light went into operation, a milestone for traffic control. Today, it is hard to imagine a world without the redyellow-green signals. And the success story of the traffic lights is continuing with "1-watt technology". This achievement has enabled Siemens to revolutionize the market and improve the energy efficiency of standard 230 V LED technology by up to 85 percent, a huge benefit for tight city budgets and for the environment. Equipped with the new technology, a typical intersection with around 55 traffic signals (red - yellow - green) avoids more than 6,000 kilograms of harmful carbon emissions a year.