AN, Being a generally courteous person I would probably be patient and just wait. I think most people would behave the same. This is not to say it doesn’t annoy me but typically people are nicer in person and would refrain from berating their fellow citizen because it took them 30 seconds longer to cash out at the grocery.
Being courteous on the road is even more important since many fatalities occur on our highways. It seems odd that often manners are forgotten when driving. I am starting to see the (ir)rational that people use to justify their behaviour on the road.