This is not the most important thing I'll ever say, but for the love of God: Use your damn turn signal. What is it with drivers just slowly drifting from one lane into another? What are you, asleep at the wheel? That's what it looks like. And what are we other drivers to think when you suddenly just brake out of nowhere so you can turn to the left or right? Show a little common curtesy. It's just not that hard, people.