Wonderful performance of the signal

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You may have seen red, green, yellow signal lights for traffic on the city's four lanes. The operation of this signal is quite simple.  Signal to the train that runs on the track has wonderful technology, features and complexity.  Signal arrangements are required for a number of trains running at different times on the same track.
Surprised to know, but when the railway was invented, the horsemen in front of the engine initially ran the railway.  The signal was detected to indicate that the engine driver is on the road safe.
Earlier, there were no light bulbs in the sinkal but put kerosene or oil funnels.  The design of the signal is based on leverage.  When the signalman pulls the lever, the green glass contained in it is exposed to the sun.  The red glass is against the lantern when the signal is not contained.  Now most of the signals have electric lights.  Both face-to-face railway station mains are given a signal to avoid running trains on the same track.  Each signal has a lock and the key is with the authorized officer.  When the engine enters the railway station, the driver throws out a circular ring.  Sinel in the bag Have permission  This is a wonderful arrangement of all three, such as the train driver, station master and signalman.  In addition to the signal, lanterns are used in red or green or red at night to express the driver.  Green and red flags are a sure sign of mowing.  The precise language of the various instructions is provided by cutting left - right or top - down, the telegraphic machine connected between the two stations has a separate system for the phone.  Its current flows through the tracks of the track, no wires required.  There are a large number of trains and a number of trains at major railway stations like Mumbai.  These stations have a large department and staff for signal management. Now the system uses electronics.

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