Our Motor Vehicle Act defines traffic as pedestrians, ridden or herded animals, vehicles, cycles and other conveyances, either singly or together, while using a highway to travel. That's right, a horse being ridden on the highway is considered to be traffic. Animal drawn vehicles are a legitimate part of the mix too.
You might be surprised to find that the rider or driver of an animal drawn vehicle has the same rights and duties as the driver of any type of motor vehicle.
Like a cyclist, this means that the horse or horse drawn vehicle is entitled to use our roads in the same way as a driver does. However, they are not required to be as near as practical to the right side of the highway. Riders must also follow all of the other rules of the roadway such as signalling their intentions, obeying traffic controls and following the slow driving rules.