Unveiled: The car with a gadget that guarantees every traffic light will be green when you get there

 The AA said the device – which is not yet in mass production – could be vital in meeting new European Union emissions standards. The motoring organisation added: ‘This could be an extremely useful tool for reducing CO2 and saving motorists money. However, it will need to be tested thoroughly in many real and different types of traffic conditions to ensure there are no problems with other drivers.’During two years of tests in Audi’s home town of Ingolstadt, Bavaria, 46 ‘intelligent’ sets of traffic lights were programmed to connect wirelessly with an Audi A5 coupé and A6 Avant estate carrying Travolution.One test involving three busy junctions found that drivers were hardly ever made to stop on red, according to the car-maker.Travolution was initially developed by the Technical University of Munich in conjunction with traffic technology firm GEVAS.Professor Fritz Busch, of the university, said: ‘The new approaches to network-wide control of traffic lights, together with communication between traffic lights and intelligent cars, exploits a potential for improving traffic flows that has previously gone untapped.’Kate Dixon of Audi UK said that if a minimum of ten per cent of cars in any given town were fitted with the technology, all road users would notice an improvement in traffic levels.Ms Dixon added: ‘Obviously, if the traffic is solid then Travolution won’t assist you. But if the traffic is moving slowly then it will advise you what speed to maintain in order to avoid stopping.’Audi said it was too early to say how much the device would cost if it is put into mass production. Further tests are expected next year.