Waiting in a metered parking space in the train station lot so that the person you're dropping off can sit and relax in the car before the train arrives/while you're waiting to pick someone up in the morning (maybe).
Some of us, when we drive to the station, are trying to park our cars so we can go to work. Just drop the person off and leave (normally, it's not raining/too hot/too cold while these people sit there, waiting). And if you're picking someone up, pull over behind already-parked cars. Because it's RUDE to take up a metered space when you're waiting ... when someone else needs to park there before the train comes.