That's just people being stubborn or bad drivers. But it's hard to be a good driver when you don't really know which turn you have to take next. Traffic can be

That's just people being stubborn or bad drivers. But it's hard to be a good driver when you don't really know which turn you have to take next. Traffic can be congested or streets can be laid out in a weird way. Navigating these situations is easier when I know ahead of time which turn I have to take. For example, if I find out too late that I have to go left, I might already be stuck in a lane where I'm only supposed to go straight or right. In this situation, I can only take a detour (can be long if I get on a highway!), block the lane until it's safe to switch or try a dangerous maneuver.