Investigators are studying CCTV vision from Carlton train station to determine how a pram carrying twin two-year-old girls was able to roll onto the tracks.
Mr Scully said the Illawarra Rail Resilience Plan, which was funded in the latest state budget, will examine the rail connection, but he does not know what the project would cost.
Six people have been charged in four days over a series of guerilla-style anti-coal protests that have caused days of rail disruptions across the Hunter region.
