Semaphore

An old thing, they say they don't make such things now. 'Wing' up - the path is open and you can go, 'wing' horizontally - stop the lokomotive. At night, the lanterns worked - red and green. If you look closely, this semaphore has two wings, this is in order to make it clear to the driver whether it is possible to follow further to the side track. Well, the way is open to us to the famous 'Locomotive Museum' near the Vitebsky railway station in St. Petersburg...