Resources

The structural number (SN) of a road pavement is a method for describing the strength of a road pavement, in pavement deterioration models that are currently being calibrated for New Zealand road conditions.

This project developed market research techniques for deriving improved values for the unit benefit parameters specified by Transfund New Zealand for use in transport project evaluation throughout New Zealand.

Recognising the significance of scour (ie channel erosion, in all its forms) as a cause of bridge damage, a screening methodology for assessing and ranking New Zealand bridges in terms of their susceptibility to scour is presented.

A methodology has been developed, based on a study carried out in 1998–99, to assist in selecting optimum slope-failure preventive maintenance programmes for highways.

Geosynthetic-reinforced soils (GRS) have been found to be cost-effective compared to traditionally used retaining structures in specific situations.

A North American method for establishing an optimised slope-failure preventive maintenance programme for use by roading authorities has been identified and trialed by way of a case study, to determine its application to New Zealand roads.

Road networks are lifelines for the community and are essential for the economic and social well-being of New Zealand.

This research continues recent work to investigate ways of analysing and providing for improved passing opportunities on state highways in New Zealand.

One 1986 and three 1991 180/200 penetration grade Safaniya bitumens (from Saudi Arabia) produced by the Marsden Point Refinery were analysed by a range of procedures to detect any significant differences in chemical composition.

A robust methodology has been developed, in 2000–2001, to locate change points (i.e.