I can see the comment in the post about the UK; I am used to this practice in a lot of EU countries I go; in the UK however, they don’t do this and the amount of roadrage there is quite staggering. I do not drive there but when I am in taxis/Ubers, the amount of honking, cutting in, swearing, (racial) insults and flipping the bird I have not seen in other countries. Ofcourse mostly in/around large cities but I have seen it in tiny villages too; enough anyway for me (YMMV) to think it is not an anomaly.
Not sure where all that anger comes from but I am happy that a hardly ever saw it in other countries where I drive or take a taxi.
I drove in Bucharest a few months ago; I did not notice this. But might well be as this is all anecdotal anyway; I have been in the UK many times, I have been in Bucharest once (I did not like it compared to other cities in RO).
Not sure where all that anger comes from but I am happy that a hardly ever saw it in other countries where I drive or take a taxi.