Why not slow traffic down on the m6 to 20mph? people die on it every year slowing traffic down to 20mph would make it safer for everyone?
Speed does not kill inappropriate speed kills.
Cyclists kill people every year so why are they not required to have 3rd party insurance and pass a test to prove they have the skills to keep others safe? or remove said licence if their cycling skill level falls below the acceptable standard?
In risk management, you can't eliminate all risks but instead limit them to a level considered acceptable.
Also, 20mph zone does not make roads safer according to DFT.
In many cases, accident and injuries have increased after 20mph zones were introduced.
https://www.telegraph.co.uk/news/2017/12/17/20mph-limit-dangerous-costly-reverse-council-admits/
One theory of what causes 20 zones to become more dangerous is that all road users become more complacent and willing to take greater risks because they "feel safer" thereby making the road more dangerous.