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You searched in: Safety and personal security


Category: Safety and personal security

Research Report 192 Accident prediction models

Published: 2000
  • Author: Beca Carter Hollings & Ferner Ltd

Accident prediction models have been developed for rural and urban intersections and links. This includes models for traffic signals, roundabouts, priority and uncontrolled intersections, rural highways, motorways and urban arterial, collector and local streets. Accident (1995 to 1999) and flow data at over 1000 sites throughout New Zealand were used to develop the models. Test statistics have...

  • Reference: 203
  • Author: TERNZ Ltd

The project was aimed at improving overtaking lane design through a better understanding of driver behaviour during overtaking. Overtaking lane designs and road geometries representative of those found on State Highways were re-created in the driving simulator used for this research. Results showed that when the diverge and merge areas are clearly visible, there is little difference between...


Category: Safety and personal security

Research Report 211 Role of road features in cycle-only crashes in New Zealand

Published: 2001
  • Reference: 211
  • Author: Opus International Consultants Ltd

Research carried out in 2001 examined the causes of cycle crashes on roads, footpaths, and cycle ways throughout New Zealand, through a survey of injured cyclists. Crashes due to impact with a moving motor vehicle were excluded, as the emphasis was on the role of road features in these crashes.

Of these crashes 28% were due to road features, mainly loose gravel and irregularities in...


Category: Safety and personal security

Research Report 215 Road trials of aggregate blends for chipseals

Published: 2001
  • Reference: 215
  • Author: Opus International Consultants Ltd

The viability of blending high polished stone value (PSV) sealing chips with standard chips in two-coat seals and void fills was investigated, with particular emphasis on their physical performance with respect to abrasion and skid resistance. Laboratory tests and on-road trials were carried out to investigate these properties, with the aim of identifying the most appropriate method of...


Category: Safety and personal security

Research Report 226 Curve advisory speeds in New Zealand

Published: 2002
  • Reference: 226
  • Author: Opus Central Laboratories

This research project investigated the use of curve advisory speed signs in New Zealand. A literature review identified key issues to examine. Current traffic behaviour at the location of curve advisory speed signs was observed in order to determine effectiveness and compliance. Alternative methods for determining curve advisory speeds, using road geometry data or accelerometer-based systems,...


Category: Safety and personal security

Research Report 233 Safety implications of flush medians in Auckland City New Zealand

Published: 2002
  • Reference: 233
  • Author: City Design, University of Auckland

Between September 2001 and June 2002, research was carried out to determine the safety implications of flush medians at 50 sites in Auckland City, New Zealand. 'Before' and 'after' crash data were analysed using both traditional methodology and Generalised Linear Modelling (GLM). Results showed that large crash-cost savings have been achieved by implementing flush medians...

  • Reference: 244
  • Author: Opus Central Laboratories

The effects of frost and ice on the skid resistance of a range of road surface types used in New Zealand were examined in a laboratory-based study, carried out in 2001-02. Frost and ice were formed on samples in controlled climate test rooms. In addition the same range of road samples was exposed to natural frost. Road surface types tested included dense and open-graded asphalts, and both fine...

  • Reference: 256
  • Author: Opus International Consultants Ltd

This report presents the results of a 4-year research programme (from 2000 to 2003) involving a combination of field, laboratory based, and statistical modelling studies undertaken to identify critical aggregate properties from the perspective of in-service skid resistance performance of chipseal surfaces. Emphasis was placed on straight and level road sections to minimise confounding effects...

  • Reference: 263
  • ISBN: ISBN 0-478-25374-5 ISSN 1174-0574
  • Author: TERNZ Ltd

The primary objective of this study, done between July 2003 and June 2004, was to determine relationships between road cross-sectional geometry and heavy vehicle performance and then to use these relationships to estimate the effect of road geometry on heavy vehicle crash risk.

Keywords: crash risk, vehicle performance, cross-sectional geometry, safety.


Category: Safety and personal security

Research Report 271 School journey safety: a comparative study of engineering devices

Published: 2006
  • Reference: 271
  • ISBN: ISBN 0-478-25382-6 ISSN 1177-0600
  • Author: TERNZ Ltd, WBW Traffic, Wigmore and Associates Ltd

The aim of this research, carried out in 2004, is to improve safety for children on their home to school journey. This is to be achieved by comparing the effectiveness of engineering safety devices used both in New Zealand and overseas, and to provide a framework for the development of a comprehensive toolbox to assist engineering practitioners and the community in selecting appropriate...


Category: Safety and personal security

Research Report 287 Multi-lane roundabout designs for cyclists

Published: 2006
  • Reference: 287
  • ISBN: ISBN 0-478-25398-2 ISSN 1177-0600
  • Author: GHD Limited, University of Auckland

Multi-lane roundabouts are typically viewed by cyclists as one of the most hazardous types of intersections to negotiate and police crash statistics bear this out. For the purposes of this research, the definition of a ‘multi-lane roundabout’ is that of a roundabout that accommodates more than one lane of traffic on the circulating carriageway.

In 2003, scheme...


Category: Safety and personal security

Research Report 288 Assessment of hazard warning signs used on New Zealand roads

Published: 2006
  • Reference: 288
  • ISBN: ISBN 0-478-25399-0 ISSN 1177-0600
  • Author: TERNZ Ltd, University of Waikato

This study, carried out in 2004 at the Traffic and Road Safety Research Laboratory, University of Waikato, assessed driver reactions to 16 road hazard warning signs of various formats. A range of measures, including attentional and search conspicuity, implicit and explicit recognition, dynamic and static comprehension, and sign priming were collected for hazard warning signs for road works,...


Category: Safety and personal security

Research Report 289 Predicting accident rates for cyclists and pedestrians

Published: 2006
  • Reference: 289
  • ISBN: ISBN 0-478-28701-1 ISSN 1177-0600
  • Author: Beca Infrastructure Ltd, Francis and Cambridge Ltd

Recent government legislation and policy promotes an increase in walking and cycling as an alternative to the increasing demand for motor vehicle travel. Concern exists, however, that an increase in these modes, particularly cycling, could lead to a substantial increase in pedestrian and cyclist fatalities and injuries.

In this research, carried out between 2002 and 2004,...

  • Reference: 293
  • ISBN: ISBN 0-478-28705-4 ISSN 1177-0600
  • Author: Opus Central Laboratories

Traditionally, treatment of frost, ice and snow on New Zealand roads has involved spreading of mineral grit on the affected areas but this has disadvantages. Common salt was used as a de-icing agent until the early 1980s when public concerns about vehicle corrosion led to its use being discontinued. A major review of options for de-icing of state highways was then carried out in 1996 by...


Category: Safety and personal security

Research Report 310 The safety benefits of brighter roadmarkings

Published: 2006
  • Reference: 310
  • ISBN: ISBN 0-478-28722-4 ISSN 1177-0600
  • Author: Opus Central Laboratories

Since about 1997 the brightness of roadmarkings on a number of New Zealand state highways has been increased. This study was undertaken to determine whether an increase in safety, as measured by reduced crashes, could be associated with the use of these brighter roadmarkings.

Keywords: curve, delineation, edgeline, edgemarker, ratio, reflectivity, regions, retroreflectivity,...

  • Reference: 312
  • ISBN: ISBN 0-478-28724-0 ISSN 1177-0600
  • Author: GHD Limited, University of Auckland

Between July 2004 and February 2006, research was continued on the safety implications of flush medians in Auckland, New Zealand. A site-by-site benefit/cost analysis found that 38% of studied sites achieved a negative benefit/cost ratio, proving that separate analysis is required for every proposed flush median site. The width of a flush median was found to have no effect on overall...


Category: Safety and personal security

Research Report 314 Accident benefits of sealing unsealed roads

Published: Feb 2007
  • Reference: 314
  • ISBN: ISBN 0-478-28726-7 ISSN 1177-0600
  • Author: Beca Infrastructure Ltd

Research was carried out between 2005 and 2006 to determine if there were benefits or disbenefits associated with sealing unsealed roads, and if so, to determine a procedure for calculating the accident savings (or costs). Road data and seal extension site information were obtained from various district councils in New Zealand and combined with the Ministry of Transport’s accident data...


Category: Safety and personal security

Research Report 322 The cost effectiveness of delineation improvements for safety

Published: Jul 2007
  • Reference: 322
  • ISBN: ISBN 0-478-28734-8 ISSN 1177-0600
  • Author: TERNZ Ltd

The purpose of this research was to develop a cost management tool that would assist road controlling authorities and their consultants to prioritise delineation treatments that have added safety benefits compared with standard road markings. A spreadsheet-based cost management tool was developed and then applied to a range of typical road marking situations. It would appear that audio tactile...


Category: Safety and personal security

Research Report 323 Curve speed management

Published: Jul 2007
  • Reference: 323
  • ISBN: ISBN 0478287356 ISSN 11770600
  • Author: TERNZ Ltd, University of Waikato

Horizontal curves have been recognised as a significant safety issue for many years, a more important factor than road width, vertical clearance or sight distance. This study investigates the issue of speed selection through curves from several different perspectives. The relationship between safety and curve speed in New Zealand was analysed using data from the Ministry of Transport’s...


Category: Safety and personal security

Research Report 342 A literature review on driver fatigue among drivers in the general public

Published: Feb 2009
  • Reference: 342
  • ISBN: ISBN 978-0-478-33496-8 (paperback) ISBN 978-0-478-33495-1 (pdf) ISSN 1173-3756 (paperback) ISSN 1173-3764 (pdf)
  • Author: Supplejack Ltd

The New Zealand government is seeking to reduce the number of road crashes that arise from driver fatigue in this country. To this end, Land Transport New Zealand commissioned a review of international driver fatigue literature (2000–2007) to assess measures against driver fatigue that would be effective for general public drivers. The review first notes that a number of disciplines...

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