Front Brake Lights

To expand on my previous post on front brake lights, I just thought of another situation in which front brake lights would be useful: You are trying to merge onto a busy highway or change lanes. In your rearview mirror, you see a car coming up quickly behind you in the lane you're trying to merge into. If that car had front brake lights that were visible in your rearview mirror, you would be able to tell whether the driver was going to let you merge or not.