Legislation is commonly used to codify public policy, whether good, bad, or indifferent. Perhaps more than you might expect, bills introduced in the U.S. Congress and state legislatures can have undue influence on how we drive, where we drive, and what controls are in place to punish offenders.
Once again what the ABD has been saying for decades now has been corroborated: the UK road "safety" industry has degenerated into a tawdry "dash-for-cash", due to its myopic -- and factually incorrect -- focus on speed as if it were the ONLY cause of road accidents.