Speed limits on parts of four motorways in the United Kingdom are to be cut before October in a trial to reduce pollution. Click here to read the full story.
Highways England said the limit will be reduced from 70mph to 60mph in areas that have seen higher than recommended levels of nitrogen dioxide.
The reduced speed limit will be introduced on M6 junctions 6 to 7 by Witton, M1 junctions 33 to 34 by Rotherham, M602 junctions 1 to 3 by Eccles and M5 1 to 2 by Oldbury.
Each locations is up to 4.5 miles long and the new speed limits will be operational 24 hours a day.
The reduced speed limits will be assessed after 12 months to see if they are having an impact, or if the air quality level is compliant.
Ivan Le Fevre, head of environment at Highways England told the BBC: "Ultimately the air quality challenge will be solved 'at the tailpipe' by vehicle manufacturers and changes in vehicle use.
"Until this happens we will continue our extensive programme of pioneering research and solutions."
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