BBC: New energy efficient traffic lights are being trialled in Derby. It is claimed the LED lights will use 70% less energy, a lower voltage will make them safer in accidents and that they will manage traffic flow better. The city council pays about £80,000 a year to power traffic lights and the first set to be installed should save £700 per year. The lights are going in at the junction of Mansfield Road and the Meteor Centre and will go live in March. Tony Gasgoine, …