Green Wave...

[empip]

http://www.telegraph.co.uk/motoring/news/5125422/Motorists-set-for-green-wave.html

...Motorists set for 'green wave'
Motorists will be able to drive straight through a series of green traffic lights along a single stretch of road after the Government relaxed traffic flow rules...

...It was because the Government feared motorists who were travelling smoothly, rather than stopping and starting, would use less fuel and pay less to the Treasury in duty as a result...

The second paragraph quote above certainly 'feels' like a truism, anyone know if it is actually a fact?