This from the telegraph.co.uk website.
Up until now the Department for Transport discouraged such schemes, increasing motorists' frustration at being met by a succession of red lights.The quote, which comes from the story Motorists set for 'green wave', shows that up until now the UK's Department for Transport has been deliberately increasing traffic congestion and frustration to insure that the British motorist paid more tax.
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
Remember the government is your friend and is here to help you!
(HT: The Adam Smith Institute blog)