This is a sandpit for people who want to
(a) argue about the efficacy of specific road safety interventions
(b) record their status as believers (with or without qualification) in the libertarian/conservative orthodoxy that climate change is a hoax/fraud/unsupported hypothesis.
I’d request no responses to those in category (b). They are, in my view, beyond help, and there are plenty of sites pointing out their errors if they want to look.