Quote Originally Posted by North Cardiff Blue View Post

The motorway has already dropped to 50mph and the A470 to 50mph, cars are ten times safer and have ABS and airbags everywhere and the speed limits are 33% less than they were 58 years ago.
You are confusing things there. The 50mph limits on the A470 and M4 are for air quality reasons and are where those roads get very close to residential areas (and last thing I saw were working I believe?).

The 20mph limit is in residential areas where car safety improvements don't mean much for pedestrians hit by cars ,especially when you consider the absolute tractors that people are now driving around in.