For years, travellers in Cambodia had to deal with one of the world's worst train networks. Trains run infrequently in between the villages, break-downs and derailments are common, and the trains themselves travel at little more than walking pace. So people in the north west of the country, near Cambodia's second city of Battambang, have taken matters into their own hands. They have created their own rail service using pieces of bamboo and abandoned barbell like train wheels. The locals call the vehicles "Norries", but overseas visitors know them as "bamboo trains".