Lauren: I can see pretty well. What was that yellow sign we just passed?
Ben: It said, "Dead End." Stop! Turn around.
Lauren: I can't. That sign says, "No U-turn."
Ben: Okay, but we can't keep going. Those signs say, "Do Not Enter" and "One Way."
Lauren: Okay, fine. I'll just pull off the road and you can drive.
Ben: You can't. That sign says, "No Stopping." Hey, you just made an illegal U-turn!
Lauren: What else could I do? Anyway, we're back on track now.
Ben: Watch out for those speed bumps! You really are blind without your glasses. You're going too fast. According to that sign, this is a school crossing zone. The posted speed limit is 25 miles per hour.
Lauren: That's only true when the lights are flashing. Is that a "Detour" sign?