Now I can only speak for the US, but most major cities have ring roads or some sort of bypass that would be perfect for a hub and spoke sort of setup alongside them. Maybe it's just the fact that the university I went to famously has a light rail system and the concept is just embedded in me, but I'd imagine the uptake of a park and ride approach with stations out in the burbs (certainly not all of them, but laid out so that you don't need to go more than a burb or two over to reach a station) would be high enough to be worth it. Putting in some shops at the stations like an airport foodcourt would help offset building costs and whatnot to a degree over time as well. Then you could tie the hubs into other major cities in the state and you've got yourself a compelling transit system, doubly so if those cities have subways.
I did a bicycle+light rail for a year and it took me about 2x the time to get everywhere I needed to go, but I could do it in a car centric city. You can't expect rural folks to have access to public transportation though. Suburbs are a stretch too in some areas.
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