sentences:  The project was to be funded from government borrowings over four years from 2001 to 2004.The supply of additional rolling stock was critical to the completion of the project, particularly in the context of the future planned rail needs for Perth.Existing rolling stock was being utilised to capacity, and based on future projections, that included the operation of a fifth railway line and passenger numbers modelling, the size of the existing fleet would not be able to cope.