[mst]

-I- would be entirely fine with an airport with those transit restrictions.

mdk (Shadowcat's resident responsible adult / business person) however has three kids, and two adults trying to wrangle three children as well as luggage makes trains much, much less attractive as an option.

So I think "fantastic to imagine, DOA as an idea in practice" applies, I'm afraid.

[egorfine]

Taxi infrastructure is entirely plausible in a project with heavy restriction for private cars.

I.e. build all the roads you want but don't make long-term parkings available.

[mst]

Fair point, I was thinking about "cargo traffic only" as in the original though experiment.

Coaches with a dedicated luggage section would quite possibly help as well, and it occurs to me that you could have a train with baggage cars ... but having never had to travel with more than one small child I can't say how acceptable those options would be to parents in general.