The project involves upgrades to State Highway 1 (SH1) between Papakura and Drury South. The project will connect with recently completed improvements further north on the Southern Corridor.

The scope of the works between Papakura and Drury South  includes:

• 10 kilometres of motorway widening to three lanes in each direction
• replacement, raising or widening of motorway bridges
• a new interchange at Drury South, which will also connect in with the new Mill Road corridor
• interchange improvements at Papakura (including a new southbound on-ramp) and Drury
• improved local road connections and community access along and across the motorway
• nine kilometres of walking and cycling paths on the northbound side, and
• widening of motorway shoulders.

The project is being delivered in stages. The first stage includes widening  the SH1 to three lanes in each direction from Papakura interchange to Otūwairoa (Slippery Creek), replacement of the Park Estate Road Bridge and a new noise wall. Further works through Stages One and Two of the project will be procured progressively, subject to planning and other approvals.

Corridor protection for a future stage between South Drury to Bombay is also included in the scope of the project. However, there are no plans to progress this section of works in the coming years.

The project forms part of the NZ Upgrade Program, which includes a NZ$6.8 billion (A$6.3 billion) investment package of transport projects across roads, public transport, and active transport infrastructure.