The DEC of urban transport in the Sydney-Newcastle-Wollongong conurbation is projected to grow from $28 billion in 2011 to $54 billion in 2031 - an increase of 3.4 per cent per year. While this is a slower rate of growth than that projected for Perth and Brisbane, Sydney-Newcastle-Wollongong's urban transport DEC is projected to remain Australia's highest. On its own, Sydney-Newcastle-Wollongong's 2011 urban transport DEC represents 14.7 per cent of all national infrastructure DEC for 2011.
The cost of delay on Sydney-Newcastle-Wollongong's urban transport network in 2011 was around $6 billion. In the absence of any additional capacity (other than projects already under construction or funded), the cost of delay is projected to grow to around $15 billion in 2031.