The Centre has sanctioned funds for West Bengal Renewable Energy Development Agency's project for solar powered traffic signals in the city. The union ministry for non conventional Energy has
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/solar-nod-centre
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/statesman-kolkata
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy