In Japan there's a cross party political consensus that public transport projects are a net positive for society. That's important when you have work which could take a decade or more to complete - the Chuo maglev project for instance will be complete when my kids are approaching adulthood and they're still not in primary school. I often wonder what we might be able to do in New Zealand (where I'm from) if we had the money and population to support it. But then I remember that one of the two major political parties always cancels or scales back anything ongoing which is public transport related, every single time they're elected, so nothing ever gets done.