You do need to practice them. When I was learning my instructor devoted significant time to them. If you come from a country that doesn't have them, it's not ir

You do need to practice them. When I was learning my instructor devoted significant time to them. If you come from a country that doesn't have them, it's not irrational to worry that you aren't going to pick up how to manage them instantly. You need to make several decisions in succession, at the same time as doing several lane merges. But they're not rocket science. If you make a simple mistake, you just end up going the wrong way and have to turn round somewhere. Holders of foreign driving licences should probably be required to do a course, including these at least, before being allowed to use their licence here.