Second and third lane early warnings. Through many of my travels in south america i often have to pass busses, trucks or slow cars. Many times i had to pass them on a straight with high visibility, but sometimes i had to pass or a short straight. Many of those times i'd just pass them and a second or third lane would open after a hill or very short time. All of those times that this happened, i always had the same thought "i wish Waze had an early warning of a second and third lane for passing heavy and long vehicles, because it would be much more safe to drive not worrying about passing others.
The information to see second and third lanes is literally open on google maps !