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Waste and Energy Management
Example of case studies demonstrating waste and energy management policies.
The following case studies demonstrate Transit New Zealand's project managers and suppliers putting Transit's Waste and Energy Management Policy into practice.
Transit's objectives for using and conserving resources are:
- To manage energy consumption and waste associated with Transit's business in a cost-effective and sustainable manner
- To make resource efficiency an integral part of all state highway activities
Other examples of waste and energy management are welcome. Please complete the case study template and send to wasteandenergy@transit.govt.nz.
Resource Efficiency
Reuse of existing pavement in Inglewood
By recycling the existing pavement, Transit reduced the need for new aggregate when reshaping a section of State Highway 3 in Inglewood. Transit used the 'in-situ stabilisation' technique to create an improved surface for resealing. Recycling saved material and reduced labour costs by about $30,000. Construction time - and disruption to the local community - was reduced from 8 days to 4 days.
| Project: | Inglewood Pavement Smoothing |
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| Contact: | Ross McCoy, Transit Engineer, Transit New Zealand tel: 06 345 4173 |
| Contractor: | Fulton Hogan |
| Dates: | May 2005 |
| Activity: | Reconstruction of 210m of existing pavement by hoeing the pavement, adding cement and reshaping prior to compaction and sealing. |
| Materials: | Cement - no additional metal required |
| Cost implications: | Original cost to rip the surface, reshape, add metal, compact and seal = $80,000 |
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Energy Efficiency
Energy efficient lighting for ALPURT B2
The Northern Gateway Alliance, an alliance of organisations working in partnership to deliver the Northern Motorway extension in Auckland, have paid close attention to opportunities for energy efficiency in carriageway lighting.
The project team has elected to use flat glass (aeroscreen) lanterns to minimise environmental light pollution. This will require lights to be placed closer together, although the energy efficiency of the design is maintained due to the selection of energy efficient lamps.
The lamps will be high output high pressure sodium, with an efficacy of approximately 125 lumens/watt. This compares well compared to other lamp types. Output from high output high pressure sodium bulbs are:
- 12% better than standard high pressure sodium lamps
- 40% better than metal halide lamps
- 43% than compact fluorescent lamps
- 78% better than induction lamps
- 140% better than mercury vapour lamps
The design of the carriageway lighting system has been designed to minimise the number of lanterns required, consistent with lighting design guidelines set out in AS/NZS1158.
| Project: | ALPURT B2, extension of the Northern Motorway, Auckland |
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| Contact: | Craig Turner, Transit Project Manager, Transit New Zealand tel: 09 368 2000 |
| Contractor: | Alliance between Transit, Fulton Hogan, Leighton Contractors, URS New Zealand, Tonkin & Taylor and Boffa Miskell |
| Dates: | 2005 - |
| Activity: | Carriageway lighting |
| Materials: | Full cut-off, aeroscreen, locally manufactured street light lantern (eg Sylvania S250CA) with flat glass and no uptilt. |
| Cost implications: | Marginal increase in capital and operating costs |
| Energy efficiency measures: | Between 12 - 140% improvement in output compared to other lamp fittings |
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| Complicating factors and solutions: | Greater number of lighting columns are required to meet lighting standards |
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