Part of the M5 is one of four stretches of motorway set to get a new 60mph speed limit under plans to tackle badly polluted roads in England.
The maximum speed limit will be cut from 70mph on four busy stretches under plans from Highways England.
A trial project will include fining drivers who break the new, lower limit £100 and slapping them with three points.
The measures will be rolled out in four areas by the end of the month in order to assess the impact of slower traffic on air quality, reports MailOnline.
Part of the M5 between junctions one and two is on the list. The stretch at Oldbury, West Bromwich, near Birmingham, is a busy spot where the motorway meets the M6.
A separate part of the M6 in Birmingham, between junctions six and seven, as well as the M1 between junctions 33 and 34 at Rotherham and the M602 between junctions one and three near Eccles, in Greater Manchester, are also on the hit-list.
The pilot project, the first attempt to tackle emissions by cutting the 70mph limit on motorways, is expected to remain in place for 12 to 15 months.
Evidence shows the reduced limit could lead to a 17 per cent drop in air pollutants.
Highways England’s head of environment, Ivan Le Fevre, told The Times : “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 programme of research and solutions.”