Drivers catch green lights 'wave'
Environmental and motoring groups say carbon emissions will be reduced.
Previously the Department for Transport (DfT) had discouraged the systems which reduce fuel use, resulting in less tax being paid to the Treasury.
But now, rather than seeing green wave systems as a "cost" to the public purse, the DfT views them as a "benefit".
'Easy target'
The RAC's motoring strategist Adrian Tink said: "Green waves is a common sense win-win initiative that will actually help motorists as they go about their daily lives as well as reduce carbon emissions.
"It's used very successfully in other countries and it would be great to see motorists up and down the UK benefit from its widespread introduction.