Unbound, I suppose, by timetables, stations, and stops. By the demands of onwards destinations and over-weight baggage. By the weather, and the occasional need to stand all the way.
But what do you learn of human nature in the car, other than that of your own emotions? Something, perhaps, if you listen to a good radio programme. But otherwise, a very limited range of expression: road rage and idiocy; courtesy and control; patience.
Patience can yield its rewards, though. As the cars slow down, you have more time to see your fellow car drivers and, in a favourite motorway traffic jam game, take an absurdist guess at their occupations. The amusement of the game doesn’t detract from the fact, though, that you’re gridlocked. And that you’re making it up.
Don’t get me wrong. I have a car. It sometimes even gets driven to work. It’s very convenient (apart from around MOT time). But, essentially, it’s a bubble. You’re visible, you can see out, but the experience is muffled. If you get too close to another car, the bubble bursts. You crash.
The train is sometimes far from convenient (though four trains an hour from Glasgow to Edinburgh isn’t bad), costs more than it should do, is over-crowded. But it allows something the car does not: the opportunity – if you so view it – to encounter the full variety of human nature. This includes those you will meet in the car (aggression, politeness, patience). But also a whole range of other emotions and modes: passive aggression, banter, helpfulness, fear, selfishness, generosity, humour, love. People rubbing each other up the wrong way, and the right way. Perhaps I wouldn’t think this if I were a south-east of England shuffler, but the Central Belt Shuffle is just fine.
Oh, and shuffling is also much better for both writing and reading, of course.