TechnologyLondon congestion charge did not improve air quality The policy of charging drivers to enter London city centre has cut traffic, but air quality has changed little, with some pollutants actually rising 51¶¯Âþ
EarthCould smart traffic lights stop motorists fuming? Traffic lights that wirelessly track vehicles would speed up journeys, reduce fuel consumption and improve urban air quality, say researchers 51¶¯Âþ