The 60mph speed limits on the M1 and M6 are set to be scrapped after National Highways said that air quality had improved but admitted that the problem will be solved another way. Drivers have been forced to slow down since 2021, amid efforts to see if a slower speed helps reduce emissions. The restrictions, which were in place at Rotherham on the M1 and Witton on the M6, were initially only meant to be in place for 12 to 15 months. National Highways have now announced that the roads will return to the national speed limit of 70mph, and that “ultimately, air quality will be solved at the tailp…