The DEC of urban transport in the Brisbane-Gold Coast-Sunshine Coast conurbation is projected to grow from $13 billion in 2011 to $31 billion in 2031, with over 90 per cent of this DEC growth attributed to road infrastructure. This is a faster rate of growth than either Sydney or Melbourne.
The cost of delay on Brisbane-Gold Coast-Sunshine Coast's urban transport network in 2011 was around $2 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 $9 billion in 2031.358
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358. The treatment of delay costs and their relationship to DEC is explained further in the Appendix 1.