Construction Update

Over the last month, we installed a safe work zone onhas involved pavement construction, bridge upgrades, retaining/noise wall construction, drainage improvements, and services relocation.

Hill Road to the Takanini Interchange:

• Retaining wall and noise wall construction continued along the southbound side of the motorway between Orams Roadmotorway.
• Earthworks and Hill Road. In this area, temporary changes included lane narrowing, a reduction in length of the SH20 merge lane, and reducing the speed limit to 80 kph. Wedrainage works continued working inunder the median and shoulders between Hill RoadAlfriston Bridge and along the Pahurehure Inlet. We also continued working to widensouthbound shoulder of the motorway bridges overmotorway. This included shaping of the Papakura Stream, andnew open channels (also known as swales), which help treat stormwater as it runs off the KiwiRail Lines.
  
  

  Manukau Interchange to Hill Road:

  • motorway.
  • Southbound lanes were narrowed and new barriers were installed just northPavement works commenced along the southbound shoulder of Oramsthe motorway between Alfriston Road through to Hill Road.and the Takanini Interchange.
  • The southbound SH20 merge lane was slightly reduced in length to ensure traffic merges safely before the Orams Road Bridge.

  Hill Road to the Takanini Interchange:

  • Earthworks and drainage continued along the southbound shoulder of the motorway. This included shaping of the new open channels (also known as swales), which help treat stormwater as it runs off the motorway.
  • Paving operations continued under the Alfriston Bridge.
  • Retaining wall and noise wall construction continued along the southbound side of the motorway between Alfriston Road and the Takanini Interchange.

  Takanini Interchange to Pahurehure Inlet:

  • Vegetation clearanceRetaining wall and noise wall construction continued along the northbound shoulder in preparation for drainage works.southbound side of the motorway.
  • Asphalting operations were performed in the median of the motorway, allowing it to be opened to traffic.
  • LightInstallation of slip form barriers and light pole installation continued in the median.
  • EarthworksWhere required, tree removal and drainagemulching continued along the southbound shoulder of the motorway. This included shaping of the new open channels (also known as swales), which help treat stormwater as it runs off the motorway.
  • Retaining wall and noise wall construction continued along the southbound side of the motorway.

  Other Areas:

  • At bridges crossing the railway line and on the Spartan Road Bridge, beam installation was completed. Retaining wall construction will continue in those areas. Take a look at the time lapse video of the Spartan Road Bridge beam installation here .
  • On the Papakura Stream Bridge, bridgebridge, deck construction began, while earthworks and drainage works continued. This included shaping of the new open channels (also known as swales), which help treat stormwater as it runs off the motorway.
  • At bridges crossing the railway lineContinued offsite production of various components for retaining walls, noise walls, and on the Spartan Road Bridge, deck construction continued. Retaining wall construction also continued in those areas.bridges.
  • Offsite, production of precast components for retaining walls, noise walls, and bridges continued.

   

  WORK BEING UNDERTAKEN IN JANUARY

  Work being undertaken in December

  Over the next month, we will install temporary traffic management to extend our safe work zone from Hill Road to just north of Orams Road. This will include narrowed lanes, a 80kph reduced speed limit, and a reduced length of the SH20 merge lane. These temporary changes will allow us to establish a safe daytime work zone, begin widening the Orams Road Bridge, commence works on the Puhinui Stream Bridge and the southbound shoulder widening. We will continue working in the median and shoulders between OramsHill Road and the Pahurehure Inlet. We will also continue working to widen the motorway bridges over the Papakura Stream, and the KiwiRail Lines. TheLines. Please note the Orams Road Bridge construction start date has been delayed. An update will be included onceclosed for 9 months from 23 January 2017 for demolition and reconstruction over the date has been confirmed.southbound lanes.

  Work this month includes:

  Manukau Interchange to Hill Road:

  • Under the Hill Road Bridge, a concrete padSouthbound lanes will form the foundationbe narrowed and new barriers will be installed just north of a bridge pier protection structure.Orams Road through to Hill Road.
  • The southbound SH20 merge lane will reduce in length to ensure traffic has merged safely before Orams Road Bridge.

  Hill Road to the Takanini Interchange:

  • Earthworks and drainage works will continue along the southbound shoulder of the motorway. This includes shaping of the new open channels (also known as swales), which help treat stormwater as it runs off the motorway.
  • Paving operations will continue under the Alfriston Road Bridge.
  • Retaining wall and noise wall construction continuecontinued along the southbound side of the motorway between Alfriston Road and the Takanini Interchange.
  • Vegetation clearance continues in the Fergusson Reserve to prepare the site for the new northbound Takanini on-ramp.
  • Drainage works will commence in the median under the Alfriston Bridge.

  Takanini Interchange to Pahurehure Inlet:

  • Retaining wall and noise wall construction continue along the southbound side of the motorway.
  • Vegetation clearance continues along the northbound shoulder in preparation for drainage works and noise wall construction.
  • Earthworks and drainage will continue along the southbound shoulder of the motorway. This includes shaping of the new open channels (also known as swales), which help treat stormwater as it runs off the motorway.
  • Earthworks and drainage works will continue along the southbound shoulder of the motorway. This includes shaping of the new open channels (also known as swales), which help treat stormwater as it runs off the motorway.
  • Retaining wall and noise wall construction continued along the southbound side of the motorway between Alfriston Road and the Takanini Interchange.
  • Light pole installation will continue in the median barrier.
  • Vegetation clearance will recommence along the northbound shoulder in preparation for drainage works.

  Other Areas:

  • On theOn the Papakura Stream Bridge,bridge, bridge deck construction,construction will commence, while earthworks and drainage works will continue. This includes shaping of the new open channels (also known as swales), which help treat stormwater as it runs off the motorway.
  • At bridges crossing the railway line and on the Spartan Road Bridge, deck construction will continue.continues. Retaining wall construction will also continue in those areas.areas
  • Offsite, production of precast components for retaining walls, noise walls, and bridges will continue.

  With the lanes narrowed, there is less time to react to other vehicles and it is important that motorists keep to the 80 km/h speed limit past our work areas. There will be ongoing truck and project vehicle movements accessing the shoulder and the median work sites. Keeping both motorists and our team members as safe as possible is imperative and we need everyone's help to do this.

  As always, we will be doing our best to minimise effects of these works on motorists as much as we can. We thank you for your patience as we work to improve journey reliability and safety along the Southern Corridor.