It would have been better to develop Harding Park Land into Railway Housing Colony, Office Complex and Commercial Usage. Constructing another station for local trains will create huge traffic congestion from R - Block to Patna Junction. Moreover the Pit Line for washing trains will also have to be shifted.
Trains Originating from Patna Junction for all directions should be shifted permanently to other stations like Patliputra, Rajendra Nagar, Danapur, as per train direction.
At karbagahiya side if we see on google map, there is a possibility to construct one more...
more... platform if some land can be aquired. And towards south patna, satellite station for local trains can be constructed somewhere at Sipara. Therefore, constructing station at harding park land is not feasible as per my understanding.