I spent a few minutes trying to find it but couldn't. This might be a good place to start looking since it specifically mentions his views on rationality. https://ndpr.nd.edu/reviews/the-paradoxical-rationality-of-sren-kierkegaard/

Agree if you are talking about people who edge over the line at the front of the queue but leaving massive gaps between you and whoever is in fro t causes issues further back.

You could be creating a block at a joining road behind you. You could be blocking a filter lane for traffic making a left/right turn from a dual carriageway.

Just move your car forward and remember that you dont know what issues your decision might cause and its a little self entitled to assume everyone else is just waiting in the same line as you.