If you see a horse and rider on the road where you are driving, you should:

Question

Any time you encounter an animal on the roadway, drive slowly to keep from frightening it. When driving near a horse and its rider, you should slow down, move away from the horse, and avoid using your horn or accelerating in a manner that may startle the animal. Animals can be unpredictable and you should do everything you can to keep them from running into your path.

Accepted Answer

Slow down.

Answer

Honk your horn to warn them about your approach.

Answer

Drive next to the horse to help it get used to vehicles.

Answer

Accelerate quickly to pass the horse.