[nvm0n2]

It's pretty obvious what's going on, as this is one of several related actions all of which are intended to penalize or restrict car usage. We know the safety argument isn't the real reason because nothing has changed about safety lately that would trigger a sudden re-think here, they weren't talking about it before and the actual expected changes are in the order of single digit deaths per year. If it was a genuine concern about safety they'd have been pushing for this limit 50 years ago.

What's actually changed in the last few years is the new political obsession with net zero. Politicians don't have a mandate for that and haven't won the argument for it, which is why these measures are facing so much resistance.