Skip to content

Important notice

The building where our contact centre is based has been evacuated so our 0800 numbers cannot be answered at this time. 0800 4 HIGHWAYS is operating for travel-related queries only and other numbers will re-open as soon as possible. For more information read our latest media release.

Access keys for nzta.govt.nz

  • h Home
  • m Menu
  • 0 Show list of access keys
  • 2 Skip to content
  • 3 Skip to top

Resources

Filter by:

Results

Sort by: Relevancy | Date | Title

Displaying Page 1 of 7

Research Report 457 Determination of personal exposure to traffic pollution while travelling by different modes

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

This purpose of this project is to assess the comparative risk associated with exposure to traffic pollution when travelling via different transport modes in New Zealand cities. Concentrations of the key traffic-related pollutants (particulate matter: (PM): PM10, PM2.5, PM1; ultrafine particles (UFPs) and carbon monoxide (CO)) were simultaneously monitored on pre-defined routes in Auckland and Christchurch during the morning and evening commute on people travelling by car, bus, on-road bike, train (Auckland only) and off-road bike (Christchurch only) from February to May 2009. The key results of this research are: • Car drivers are consistently exposed to the highest average levels of CO. • On-road cyclists are exposed to higher levels of CO, PM1 and UFPs than off-road cyclists. • Car drivers and bus passengers are exposed to higher average levels of UFP than cyclists. • At some parts of their journeys, travellers are exposed to very high levels of...

Research Report 348 The development of gravel deterioration models for adoption in a New Zealand gravel road management system

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

This report provides the outcomes from research based on the Land Transport New Zealand gravel road monitoring programme that commenced during 2002 and included the cooperation of 51 local authorities. These sections were monitored on a sixmonthly basis and all relevant data such as maintenance, rainfall where available and evaporation were incorporated into a national database. This research project included the provision of practical guidelines for the construction and maintenance of gravel roads. In addition, the gravel road data were analysed and outcomes are presented. The resulting models are effective indications of gravel loss on a network scale but further research would be required for more detailed models. This can be achieved by collecting more information on the impact of routine maintenance such as blading.

Research Report 515 - The effect of rainfall and contaminants on road pavement skid resistance

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audiences: Communities, General

This research project, which was undertaken between 2003 and 2006, aimed to improve the understanding of the effect that environmental factors (eg rainfall and detritus) have on the variation of measured skid resistance, both in the short and longer term. Phase 1 of the research was a field study of seven sites in the Auckland and Northland regions over 2.5+ years, with regular skid resistance measurements primarily utilising the GripTester. Phase 2 involved developing a new laboratory-based accelerated polishing device and methodology for testing large (600 x 600mm) chipseal surfaces with the Dynamic Friction Tester.

Research Report 393 Relative costs and benefits of modal transport solutions

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

This report describes the outcomes of a study commissioned by the NZ Transport Agency to inform local authorities about the costs and benefits of transport modes. The aim of the study has been to provide general advice on the relative cost and benefits of alternatives with a focus on passenger transport in urban areas.

Research report 404 Environmental and financial costs and benefits of warm asphalts

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

Warm asphalts are asphalts produced at significantly lower temperatures than the C that is typical of a hot mix plant. Depending on the approximately 160 technology used, laying and compaction may also be possible at significantly reduced temperatures. The report gives a summary of current warm asphalt technologies, followed by details of costs, temperature reductions and energy savings. A comparison is made of potential environmental costs and benefits of hot mix manufacture and the different warm mix methodologies.

Research Report 462 Lifetime liabilities of land transport using road and rail infrastructure

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

The aim of the project was to establish the whole-of-life environmental performance of passenger and freight movement that uses roads and rail. The performance indicators selected were life cycle energy consumption, life cycle stormwater contamination, and life cycle GHG emissions. This study was based on process assessment and considered material use, transport requirements, on-site machinery use, and fuel use. The impacts of traffic delays and rolling resistance were not considered. The study was undertaken in New Zealand between October 2009 and March 2011 using data for the year beginning July 2007 and ending June 2008.

Research Report 395 Enhancing the control of contaminants from New Zealand's roads: results of a road runoff sampling programme

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

This study provides guidance on vehicle emission factors (VEFs) for loads of copper and zinc discharged in road runoff, and the performance of stormwater treatment devices for removing these metals and total suspended sediments (TSS). Between February 2008 and June 2009, a field programme comprising the measurement of road runoff volumes and the collection and analysis of runoff samples was conducted at four sites, of differing traffic characteristics, in the Auckland Region. Concentrations of copper and zinc were higher at a congested site than at two sites at which traffic generally moved freely. Substantially lower TSS and metal concentrations were measured at a moderately congested site, counter to expectations and possibly reflecting the recent resealing of the road surface at this location with open-graded porous asphalt (OGPA). VEFs estimated using a contaminant accumulation/wash-off model provided the basis for determining a set of guideline copper and zinc VEF values for (1)...

Research report 485 Ground vibration from road construction

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

There is an increasing requirement to control and manage ground vibrations generated by road construction and maintenance activities through project specific construction management plans. The objective is to minimise any potential adverse effects. The ability to reliably estimate vibration levels of specific construction activities at the project planning stage and to assess their likely effect on structures and their occupants is therefore required. Typical vibration characteristics for various activities, including site preparation, dynamic compaction and piling were measured for representative equipment and soil types to obtain baseline values for use in preconstruction assessments and to enable validation of available prediction methods. A review of international standards was also undertaken leading to two proposed criteria against which predicted vibrations can be assessed for damage and human perception. The possible application of data acquired from commonly used geotechnical methods, notably scala penetrometer for estimating soil attenuation and falling weight deflectometer to generate...

Research Report 596 Understanding trends in roadside air quality

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

The primary aim of this research was to improve the understanding of how vehicle emissions are trending over time in New Zealand and how this relates to observed trends in local air quality.

Research Report 326 Road surface effects on traffic noise – stage 3: selected bituminous mixes

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

The noise from road traffic affects large numbers of people living in the vicinity of State Highways and arterial roads. An increasingly important aspect of developing traffic noise reduction measures is the definition of ‘quiet’ road surface types and their application in affected areas. This project, undertaken in 2004–2005, identifies the noise effect that different low macro-texture bituminous mix road surfaces, such as asphaltic concrete, slurry seal, open graded asphalt and stone mastic asphalt, have on road traffic noise at urban driving speeds and at open road speeds.
Top