In the U.S., McDonalds and other fast food restaurants have a "drive-through" where you can order your food, pay and receive your food without getting out of your car. Could this be it?
the context is: how can you make the optimal number of steps (10 000) daily in order to lose weight. The author gives tips on what we should or shouldn't do in order to achieve this nuber: he says:
-pace up and down while you are waiting for a bus or train
I suppose it helps a bit if you get out of your car and walk to the counter for your junk food rather than sit in the car and have it handed in your window.
Well, there are also "drive-through windows" at banks (I hate the name, because of course you don't actually drive through the window, but I don't know what else to call them). I suppose the advice is to park your car and get out and whenever possible instead of staying in your car.
We have loads of fast food drive throughs in the UK (I think they did originate in the US though and they've only started popping up here in the last decade or so).