Horse riders and horse-drawn vehicles. Be particularly careful of horse riders and horse-drawn vehicles especially when overtaking. Always pass wide and slowly. Horse riders are often children, so take extra care and remember riders may ride in double file when escorting a young or inexperienced horse or rider. Look out for horse riders' and horse drivers' signals and heed a request to slow down or stop. Take great care and treat all horses as a potential hazard; they can be unpredictable, despite the efforts of their rider/driver.