A red and white triangular sign at an intersection means:

1. Slow down and be prepared to stop if necessary ✓
2. Look both ways as you cross the intersection
3. Slow down if an emergency vehicle is approaching
4. Always come to a full stop at the intersection

Answer: A. Slow down and be prepared to stop if necessary

The red and white triangular sign is a yield sign: slow down and be prepared to stop if necessary.

Why this is the answer

The handbook describes the yield sign as red and white with red letters. It tells you to reduce your speed as you get to the intersection and to be ready to stop so you can give the right-of-way to traffic and pedestrians already there or approaching. It also says a full stop is required only when traffic conditions make it necessary. That matches slowing down and being prepared to stop, not stopping every time.

Why the other answers are wrong

• B. Look both ways as you cross the intersection — Looking both ways as you cross is not the sign's instruction; the handbook says the yield sign directs you to reduce speed and be ready to stop and yield.
• C. Slow down if an emergency vehicle is approaching — The sign is not about emergency vehicles; the handbook ties it to yielding to vehicles and pedestrians in or heading toward the intersection.
• D. Always come to a full stop at the intersection — The handbook says you must come to a full stop at a yield sign only if traffic conditions require it, so a stop is not always required.

Remember it

Think of the triangle as a warning to ease off the gas and have your foot ready for the brake, because yielding may or may not require a stop.