In sunny north Wales there’s a stretch between the end of the M56 and joining the A55 which has recently become a long 50mph zone to reduce pollution. The limit starts at the Wales border and runs for about 4 miles into Wales. It runs through industrial areas with water purification, metal recycling and the Toyota engine manufacturing plant. As a large flat plane at the bottom of the Dee estuary it’s usually windy.
How on Earth the reduced pollution is supposed to stay in that area is a mystery.
