You wouldn't have to imagine it if you visited Dallas. AT&T stadium has roughly the same capacity as Wembley, and no public transit at all.

Dallas would look very different if they emphasized public transport. Outside of downtown it is so sparse, many of the suburbs suffer from crumbling infrastructure because it turns out pipes made to last 30 years do poorly after 40 to 50 years when all the low density suburbs have aged out.

Fort Worth is worse.

Are they crap during peak hour traffic or mass public events? Sure are! They're not some miracle device.

But people claiming that you can live a life without cars don't seem to realise the very many scenarios where cars are often easier and sometimes the only answer.