I hear the term "modal shift" - referring to the move of passengers from cars to public transport -- a lot, and a lot of discussion of how to achieve that. But I've now seen the answer - copy the Swiss in practically everything. And an excellent place to start would be bringing the railways back into public hands.
I've often wondered why rail travel provides more opportunities to converse than air travel and I've concluded that much of it has to be linked to the fact people have more space and sometimes sit facing each other during journeys. Seeing the historic Belgian city of Namur through the carriage windows, the dense forestation of the Ardennes and the skyline of Rotterdam prompted conversation among the people with whom I was sitting.