Here's a new pet hate that's recently arison from the war on so-called "speeding" when driving. It's become especially prevalent since 20mph zone were put in everywhere, too.
It's when a car in front of me drives off and is rather slow going around 20-25mph. Normally, they speed up to something reasonable, but increasingly often, they don't, they just sit there at this slow pace in third gear and the single lane road makes it impossible to overtake them, while the cars in front disappear into the distance. It's infuriating to sit there waiting for them to speed up, but then it just doesn't happen. If there was ever something to incite road rage, it's this. 20mph for safety, my ass.