As per Newspaper the Central angle of JMP-MGR-BGP Y Leg curve is 180 degree. and we know the arc length is 610 meter. So we can find the radius of the curve. As per wikipedia Indian Railways sharpest curve permitted on broad gauge is 175 meter radius. Minimum_railway_curve_radius
Now We have length of the Arc is 610 meter and Central Angle 180 degree(= 3.1415926536 radians).
Formula Curve Radius = Arc Length / Central Angle(In Radians)
Now...
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the JMP-MGR-BGP Y leg Curve Radius = 610/3.1415926536 Meter = 194.17 Meter.
which is greater than the Sharpest curve made by Indian Railway. So It is feasible.
I have added the diagram of the current construction, according to me the central angle is not 180 degree, don't know where the information comes from to the newspaper, newspaper is wrong about the central angle, according to me the central angle is little bit more than 90 degree, if we think it is 100 degree(= 1.74 Radians) then the calculation will be.
Now the JMP-MGR-BGP Y leg Curve Radius = 610/1.74 Meter = 350.57 Meter.
Which is far better than the Sharpest curve in india. I agree there must be some problem in construction but this is not related to architecture.