Ireland: cycle lanes that end suddenly in the middle of a road, with no warning and a bus behind you.
netherlands, month six on a bike. things nobody told me: the bell is for communication, not politeness. hand signals are expected, not optional. you can get a fine for cycling without lights, and the police do check. and the bike lane has its own traffic lights, which i ignored for two weeks before someone shouted at me.
what cycling rules caught you out where you live?