A red and white triangular sign at an intersection means:
- Slow down if an emergency vehicle is approaching.
- Look both ways as you cross the intersection.
- Always come to a full stop at the intersection.
- Slow down and be prepared to stop if necessary. ✓
Answer: D. Slow down and be prepared to stop if necessary.
A red and white triangular sign means you should slow down and be prepared to stop if necessary, because it marks a yield.
Why this is the answer
The handbook's list of warning signs includes the yield warning, which tells you to slow down and be ready to stop or adjust your speed to the traffic around you. That matches the idea behind the triangular sign: you are not required to make a full stop, but you must be ready to give way if traffic demands it. So the right approach is to ease off the gas and stay prepared to stop rather than committing to a hard stop.
Why the other answers are wrong
- A. Slow down if an emergency vehicle is approaching. — Nothing in the handbook connects this sign to emergency vehicles or tells you to slow only when one is approaching.
- B. Look both ways as you cross the intersection. — Looking both ways is a habit at any crossing, but the handbook's yield guidance is about slowing and being ready to stop or adjust speed, not just looking.
- C. Always come to a full stop at the intersection. — A required full stop belongs to the stop sign guidance, which says to slow and be ready to stop at the sign; the yield instruction allows you to adjust speed instead of always stopping.
Remember it
Treat it as give way, not halt: lift off the gas and hover over the brake so you can stop or keep rolling depending on traffic.