A new, innovative traffic light that lasts much longer than traditional ones and has better energy efficiency and almost no operation and maintenance cost has been developed by a Danish firm, Technical Traffic Solution A/AS. The traffic light has even picked up one of the European Union's product awards for sustainable development for this year. It has a lifetime of 10 years
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/traffic-signal-goes-green
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/european-union-eu