IDEA: extrovert train carriages. Like those ‘chat to me’ benches, but a whole carriage of the train dedicated to people who wanna talk rather than just read a book or listen to music (through headphones, of course) and enjoy the scenery. Introverts can drop their extrovert mates off in those carriages so they have people to chat to, and extroverts will leave us alone to enjoy our quiet time.