It's also being rolled out in berlin and what I saw it's really, really great. But there are drawbacks. People living on the main streets get more traffic and p

It's also being rolled out in berlin and what I saw it's really, really great. But there are drawbacks. People living on the main streets get more traffic and pollution and some violently oppose it. Public transit and emergency vehicle access can be solved. It's really not that easy to implement because car drivers will try to drive through anyway, so you have to install modal filters everywhere (elements that bike traffic can flow through but not car traffic). But then you have to think hard about public transit and emergency vehicles. So it's not really that cheap. I think you have to reduce car-dependency first, afterwards you can roll them out because the acceptance is higher and advocacy groups form.