Local governments (at least in the US) seem to systematically underinvest in experiments like this. Things like traffic congestion have a ton of weird, largely unpredictable positive and negative feedback loops. Seattle removed its waterfront viaduct from service for a couple of weeks before changing over to the new $3.3B tunnel and traffic was mostly fine, despite apocalyptic predictions of gridlock. It's not entire…
Local governments are generally paralyzed by a fear of being liable if it somehow goes sideways. Of course they cling to the status quo for dear life.
What I hear all the time with programs like this (where politicians almost have the opposite problem) is basically this type of (slightly made up) media dialog: “won’t it be dangerous to force children to ride bikes from age one?”
“Yes, but if we are to meet the emission goals by 2025 we have no choice”.
To be clear, think it’s good that politicians are more afraid of being seen as having done too little, than they are afraid of being liable for their actions.