New Forest pony time. The rest of the year, the lives of the ponies are relatively unhindered unless they need veterinary attention or additional feeding, when they are usually taken off the Forest. The open nature of the New Forest means that ponies are able to wander onto roads. The ponies actually have right of way over vehicles and many wear reflective collars in an effort to reduce traffic fatalities, but despite this, many ponies, along with commoners' cattle, pigs, and donkeys are killed or injured in road traffic accidents every year. Human interaction with ponies is also a problem; well meaning but
Traffic congestion that could well result in increased traffic flow, otherwise known as induced demand, causing congestion to appear somewhere else. Moreover, Braess' paradox shows that adding road capacity might make congestion worse, even if demand does not increase. It has been argued that traffic congestion, by reducing road speeds in cities, could reduce the frequency and severity of road accidents. City planning and urban design practices can have a huge impact on levels of future traffic congestion, though they are of limited relevance for short-term change. Congestion can be reduced by either increasing road capacity (supply), or by reducing traffic (demand).