These operate as a bus service around the island during the day time . They go on either clockwise or anti-clockwise routes from and to Nathon Town in the North of the West coast. Services start quite early in the morning and go on until 6 or so in the evening.  SongTao is the cheapest way to get around Samui by public transport.   The price from one side of the island to the other (Nathon to Chaweng) is 50 Baht, shorter distances should be increments of this but it doesn’t always work out like that - unless your going a very short distance more info.»