Welsh Slow Down

From September 2023, the Welsh Assembly will make 20 mph (32 kph) the default speed limit on the country's residential roads (https://www.theguardian.com/uk-news/2022/nov/07/residential-speed-limit-20mph-wales). Death and serious injury (especially to pedestrians and cyclists) are much less at 20 mph than they are at the current 30 mph. It's been estimated that this change will reduce Road Traffic Accident deaths on Welsh residential roads by about 10 each year. This may sound a small number but lowering the default speed limit could save, in its first year of operation, circa £100m in total costs (including losses of earnings and medical treatment of injuries). Many people think that a majority drivers will fail to respect the new 20 mph limit and it prove difficult to enforce. Making 20mph the default limit, however, leaves local authorities with the power to decide (hopefully, after consultation with residents), which of 'their' roads can remain at 30 mph. In spite of predictable objections from motorists, this change is well worth piloting. It may well be eventually adopted more widely in the UK (like the ban on plastic bags)?