In order to transfer an engine or carriage laterally to another line of rails, at a station or terminus, circular platforms called turntables are established upon each set of rails, which turn as upon a pivot in the centre of each line, each contiguous pair of tables being connected by short branch rails, standing at right angles to the line of rails. The engine or carriage to be transferred is brought to rest wholly upon one table, which is then turned a quarter round, and the carriage is then wheeled on to the next turntable, which being likewise turned a quarter round, the engine or carriage will then be in a position to proceed on the line to which the second table appertains.