How do you transport bamboo logs from one place to another when the roads are bad, not big enough to carry long transport vehicles but you have a fast flowing river. Simple, you tie the logs together make a long raft and drift down river. We first saw these rafts on the northern rivers in Burma, so were not really surprised to find the same custom in the neighboring country. The "drivers" of the rafts live on them for the duration of the journey, erecting tents,often the family travel together.