Resources

This research project examined the economic, structural and attitudinal impediments to the recycling of materials in roading in New Zealand.

Road traffic noise is a major cause of environmental concern in New Zealand.

Most chipsealing in New Zealand is carried out using bitumen cutback (i.e.

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.

Contamination of freshwater resources and estuaries as a result of runoff from urban development in New Zealand is threatening aquatic life.

The modification of the UK CRTN (Calculation of Road Traffic Noise) formulae for the prediction of traffic noise from uninterrupted traffic flows has been researched.

This report describes a study, carried out in 2006–2007, of the potential toxicity to the environment (ecotoxicity) of cationic bitumen emulsions used for chipsealing (surface dressing) in New Zealand.

There are many techniques for restoring pavement surface microtexture after levels have become deficient.

Coal tar-derived roading material contains over 1000 times more polycyclic aromatic hydrocarbons (PAHs) than equivalent bitumen pavements and has been identified as a major source of PAHs in both Christchurch and Auckland aquatic receiving environmen…

This study, undertaken in 2003–2004, aimed to: study changes produced when additives are mixed with roading aggregates containing swelling clay minerals; identify the most suitable chemical to use for a particular rock type and the quantity required …