It proved to be the most challenging project ever undertaken by Transfield. Prior to the bid being lodged, the consortium had to convince politicians, bureaucrats, technocrats and financiers that it was capable of meeting a number of very significant hurdles. Most importantly, it needed to demonstrate that the estimated road use patronage and tolls, were sufficient to finance the $2 billion project. This was to be the biggest Australian BOOT project ever. At the same time the consortium brought together a large team of engineering, banking, traffic, operations, tunnelling.