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==Costs and section length==
{| class="wikitable" border="1"
|-
! Section
! Length
! Cost ($ million)
! Completion date
|-
| Upper Harbour Motorway SH18
| 12 Km
| 400
| 2012 (Greenhithe section Dec 2007)
|-
| [[Waterview Connection]] SH20 - 16 connection
| 4.5 Km (3.2 Km tunnel)
| 2200
| 2015 (possibly later)
|-
| Mt Roskill extension SH20
| 4 Km
| 186
| April 2009
|-
| SH20 widening
| 4 Km
| 230
| Mid 2011
|-
| SH20 - 1 connection
| 4.5 Km
| 210
| August 2010
|}
All up the entire route could cost more than $3 billion dollars and may be completed by 2015, with possible tolling of one or more sections. The entire route is either 6 lanes or has the capacity to be expanded to 6 lanes later.
