Resources

Safety and environmental drivers are pushing the New Zealand road construction industry away from hot, cutback binders and towards the use of emulsified bitumen as the delivery medium for chipseal binders.

Glass bottles collected by councils are forming large stockpiles, particularly in the South Island, as it is uneconomic to transport the glass to the Auckland plant for recycling.

This research, carried out in 2003–2004, aimed to facilitate the recycling of asphalt mix, recycled asphalt pavement (RAP), and crumb rubber (CR) from waste tyres into New Zealand roads.

Reliable techniques have been used in a number of countries throughout the world for some years now for the prediction, measurement, assessment and control of road traffic noise.

In 2006–2007, 35 road-derived sediments (RDS) consisting of street sweepings and catchpit (ie sump) sediments, were collected from three cities in New Zealand; namely Auckland, Hamilton and Christchurch.

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.

Warm asphalts are asphalts produced at significantly lower temperatures than the C that is typical of a hot mix plant.

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).

This project was undertaken in 2001 to review environmental protection measures that have been applied through the Resource Management Act (RMA) process, to a sample of 35 state highway roading projects constructed in New Zealand, between the years 1…