Resources

Refining practice for bitumens in New Zealand has been reviewed over the years, and a range of bitumens of different temperature sensitivities may become available for roadmaking in New Zealand.

This report describes the work undertaken between 1992 and 1995 under the first and second stages of a research project into road vehicle repair and maintenance costs in relation to road operating conditions.

Transit New Zealand regional offices and selected local authorities were asked for information from their records on age and proximity to the coast of their bridges.

In April 1994 a comparative trial of the performance of bitumen emulsion and cutback bitumen as chipsealing binders was constructed.

This report describes a substantial research project to determine procedures for assessing the road-friendliness of heavy vehicle suspension systems. The initial aim was to develop a procedure for replicating the on-road dynamic wheel forces generate…

This report presents the results of a research project, carried out in 1994, to investigate the suitability of fixed slip friction meters for on-road determination of pavement surface abrasiveness of New Zealand SEALED roads.

Two aspects of hydraulic design are addressed: the determination of a design peak flood flow rate; and the estimation of channel flow resistance.

This report records part of a research programme on tourism benefits from sealing unsealed roads to address concerns raised that the Transit New Zealand project evaluation procedures may not fully account for benefits arising from improving roads in …

The results of an experimental study carried out in 1993 of the use of riprap to protect bridge piers against scour are presented.

A research project was undertaken in 1994 to investigate motorists' perceptions of discomfort and risk factors associated with using unsealed roads in New Zealand.