The speed limit will be lowered on parts of four motorways before October as part of a test to reduce pollution, Highways England said.
It will be reduced from 70 mph to 60 mph in areas that have experienced nitrogen dioxide levels above recommendations.
The test will take place over stretches of nearly five miles.
It will be 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.
Nitrogen dioxide (NO2) released by car exhausts is a serious air pollutant and indirectly contributes to global warming.
The impact of the new 60 mph limit will be reviewed in a year
Ivan Le Fevre, Environment Manager at Highways England said: “Ultimately the air quality challenge will be solved ‘at the tailpipe’ by car manufacturers and changes in the use of vehicles. vehicles.
“Until that happens, we will continue our extensive program of research and pioneering solutions. “
The Department of Transportation said the trial was one of a number of measures to improve air quality.
As part of a plan to reduce NO2 levels, the government aims to end the sale of all new conventional gasoline and diesel cars and vans by 2040.
He has conducted consultations to move this forward until 2035, or sooner if a faster transition seems feasible, and has considered including hybrids for the first time.
The outcome of the consultation will be announced at a later date.