the lantern has four different surfaces and three of the surfaces have different symbols that bring different meaning. the rectangle means the train can move, the round shape means the train has to stop and the arrow means that the train can move through the direction showed. this lantern is usually being put outside of the railway station so that the train driver can see this lantern. this lantern is portable and can be moved accordingly. at the past, this lantern is very important in giving directions to the driver. it was used for more than 70 years ago.