If you see a horse and rider on the road what should you do?
Sound your horn to warn the rider
Slow down and give them plenty of room
Speed up to pass the horse
Explanation: On seeing a horse on the road (whether ridden, driven or led), please slow down to a maximum of 25kph and be prepared to stop if necessary. Heed a rider's or carriage driver's signal if they ask you to stop or slow down.

