Which statement is true about green and red lights?

• A. Green means stop; Red means proceed
• B. Green means proceed with caution; Red means stop
• C. Yellow means proceed with caution
• D. Red means yield to pedestrians

Answer: (B)

Green signals you may go, but you should do so with caution. That means look for pedestrians, cyclists, and other vehicles that might be in or approaching the intersection, and be prepared to stop if anything unexpected happens. Red means you must come to a complete stop and not enter the intersection until the light turns green again. After stopping, you may proceed when it’s safe and the light is green (and only then, except when a turn-on-red is allowed by local laws). Yellow means slow down and prepare to stop, since the light is about to change to red. The idea that red means you should yield to pedestrians isn’t accurate for the vehicle signal, because red requires stopping and then proceeding only when you have a green signal and it’s safe.