Hong Kong has this system, and I love it. The airport is far enough out, that it has it's own train, (the airport express). Not the actual security screen, bu

Hong Kong has this system, and I love it. The airport is far enough out, that it has it's own train, (the airport express). Not the actual security screen, but all the rest of it can be done right at the train station. You can check your bags and even check in for your flight. The lines are short, and you can dump the bags early and enjoy the trip.