Minecraft wiki entry for Water_tram, associated text: To build the tram, first place two lines to contain the water with at least two blocks of space between them. Next, at the beginning of the lines, place buckets of water stretching between the lines. At the end of the flow of water or somewhere before, place pressure plates to prevent a backwards flow. Right after the pressure plates, place more water and repeat until it becomes as long as wanted. Refer to the photo if you get confused. Making two parallel trams in opposite directions can allow easy two-way transportation. The pressure plates can be connected to redstone circuitry and act as motion sensors.