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Once out and up from the fjords and their rock-bound tunnels, it felt like arriving in a lunar landscape. A train may enter a block on order only. Application of railway signals Cab signalling North American railroad signals Railway semaphore signal. To set up a route, the train director sends a route command to all signal boxes involved. These trams can be seen in the video below. The lower-quadrant version waved the target below the motor box and was intended to be above traffic on a pole mounted cantilever see above photos. Priority based setting is used if the two routes are of different priority.
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Some Basics of German Railway Operations

To change the direction, the operator at the station where the opposite locking instrument is unblocked has to operate that instrument. Operation of this instrument locks a route lever in the dependent box and releases a route lever in the command box. In Southern and South-Eastern Germany, and in the states of the former Empire of Austria-Hungary today Austria, the Czech Republik, Slovakia, Slovenia, and Hungary , the train director was often completely relieved from operating points and signals. This made it possible to connect a signal box with a relay block system via block lines to a signal box equipped with traditional block instruments. After the train has passed over the track circuit for route release, the route locking block instrument is released.
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german block and interlocking principles systems

The route lever can only be moved if all point levers are in the required position for that route. Thus, the train director is protected from sending commands for conflicting routes. The Norfolk and Western decided to make a change where the motion-limiting bumpers were placed on the front of the signal instead of inside at the rear. The wigwags at the crossing that mark the location of the western terminus of the BNSF in Richmond, California became pawns in a fight over local control in There are six different incredible slides including one with a 60 degree tilt. The operator can also manually switch on these devices to keep the block system working for movements that are for some reason authorised to pass the signal in stop position.
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In contrast to a point operator, a block operator is not a subordinate of a train director. Trains always display rear end markers. The second point has no equivalent in the Anglo-Saxon world but is a very essential element in the German operating philosophy. All signal boxes in the control district of a train director are electrically connected to each other by a so-called station block system which is described in the chapter on interlocking principles. Paintings by Wilhelm Geyer June 24 - October 7. However, since the point operator clears the signal, a command from the train director is required. It was the five-hundredth vehicle manufactured by Pesa.
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