It's called a 'Check Rail'. Usually you can see these on the inner side of curves. If a train derails on a curve, it will tend to move over the outer rail ( The wheel will climb over the outer edge of the curve). In that case, the inner wheel will touch this check rail and stop further outward movement. You can see these kinds of rails at points and switches also, where trains switch tracks.

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A perfect shot and great description by D S P Anirudh..

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i think technical term used is ""gaurd rail",and yes it prevents wheels from derailing(extra stability),usually we can see them on bridges,under FOB's

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Both terms are interchanged frequently. But normally, the term 'Guard rails' is used for the cases where there are 2 inner rails. These are usually seen on bridges and belo FOB's etc. The 'term 'check rail' is usually used for the cases like in the above pic, where the extra rail is on only one side of the tracks. However, there is no fixed definition for these terms I guess and I have seen people use both terms to refer to such track layouts.

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nice pic.

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Red markings removed 😣

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It is present in 39006.

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Last WAP-4 <3

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AC Coach count karke kon train identify karta hai bhai😂😂😂😀😀
TB dekh ke identify karo.

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Ye distance learning ki tarah h door se dekhkr.

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Someone also discussed the same what does it mean.

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After 25051, No more WAP-4s are being Manufactured. Only WAP-5 n WAP-7s are being Manufactured now

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