The only Rajdhani in IR which does 140 km/h are just two trains i.e Bombay Rajdhani n August Kranti Rajdhani, which were cleared by RDSO n CRS.
The only train to touch 150 limit is Bhopal Shatabdi, and everyone knows that.
The Other Rajdhani's have 130 limit and depends on the sectional route.
Patna Rajdhani, RPJB does 110-130. 110 in Patna - Mughal...
more... Sarai - Patna n 130 in the rest as Mughal Sarai - Ghaziabad is 130 only.
140 limit will b given only after RDSO n CRS approves it.
At present AK n BCT have clearance only for short stretch, not the entire route.