SCR's Rayanapadu wagon workshop (outside BZA) has modified some of the old 4 wheel tanker rakes to carry fly-ash from various power plants in and around BZA.

Yes Samit, this is indeed called a well wagon.

Isn't this what they call a well wagon?

@Anant Singh..you are right, have seen plenty such at BHEL Hardwar yard as well as Hardwar station.

This a recessed flatcar used for carrying oversized loads such as pressure vessels. I've seen one such wagon belonging to BHEL Trichy that carried a pressure vessel for our nuclear power plant till boisar.The cabs at both ends monitor load and its stability. I don't remember correctly but these have very slow allowable speed (around 40 kmph).

Rare indeed!! From the looks of it, probably was the chassis for a BG crane as part of an ART - I'm presuming so, by looking at the hut-like structures and also the wheelsets on it at both ends. In all probability it was a self powered crane with bi-directional operability, and possibility haul a tiny payload behind it.

o Wow.. What on earth is this?? Never seen such a vehicle..anyone can easily board this vehicle, when the train runs at a lowest speed... ;-)

I suppose it increases capacity while saving on weight.

Any special advantage that the excessively curved dome-shaped roof provides over the existing more flatter design?

Shikhar - look carefully, the rig on the right has side sprayers to force water on the doors of the wagon.