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Research Report 301 Best practice for use and design of truck mounted attenuators (TMA) for New Zealand roads

Published: | Category: Research & reports , Research programme | Audience: General

Truck Mounted Attenuators (TMA) are widely used on New Zealand Level 2 and 3 state highways and on some network roads that carry high-volume high-speed traffic, to provide safe environments for both roadwork crews and road users. They are used for static, semi-static and mobile operations carried out on sealed carriageways. However, current practice (specified in the 3rd edition of Transit New Zealand Code of Practice for Temporary Traffic Management (CoPTTM June 2004)) has not prevented 39 TMA incidents occurring in the past five years (July 1999 to July 2004), including four fatalities, as well as numerous injuries. Rather than enhancing safety, the VES currently used on TMA have the potential to adversely affect driving, and to create unsafe circumstances by providing drivers with inefficient messages. This high incident rate involving TMA on New Zealand roads prompted the roading industry to form a Working Group (Fulton Hogan, Higgins Group, and...

Research Report 026 Highway permits programme review

Published: | Category: Research & reports , Research programme | Audience: General

The Highway Permits computer program stores overload capacity data for all state highway bridges, and some local authority bridges, together with a description of the highway network. On entry of details of an overweight vehicle and its proposed route, the program provides details of restrictions which will be imposed on the vehicle as it crosses any of the bridges on the route.

Research Report 302 Intelligent transport systems: what contributes best to the NZTS objectives?

Published: | Category: Research & reports , Research programme | Audience: General

The purpose of this study has been to document international experience of where the greatest benefits have been gained from the implementation of Intelligent Transport Systems (ITS), and to compare these benefits with the key outcomes sought in the New Zealand Transport Strategy (NZTS) and Land Transport Management Act (LTMA). The resulting report provides guidance on the ways in which different ITS initiatives can contribute to these objectives, with a particular focus on the use of ITS for demand management and in optimising the use of existing land transport infrastructure. Keywords: arterial management, bus, crash prevention, emergency, environmental monitoring, fleet management, hazardous materials, incident detection, information dissemination, intelligent transport lane control, message signs, motorway management, parking, public transport, rail crossing, ramp, ride share, road geometry, road weather, routing, rural highway, safety screening, signal control, smart cards, speed enforcement, toll collection, traffic monitoring, tunnel, urban traffic, user charges, weight screening

Research Report 179 Effects of public transport system changes on mode switching and road traffic levels

Published: | Category: Research & reports , Research programme | Audience: General

A research project was undertaken to appraise international evidence on the effects of changes in urban public transport systems and services on the extent of switching to/from car travel and on total road traffic volumes, and to develop guidelines for use in the evaluation of urban transport projects in New Zealand. The major part of the project involved collection and appraisal of international evidence, for situations where changes have been made to the urban public transport system, on the proportion of additional public transport trips that would otherwise be car driver trips, and on the effects of the mode switching on overall road traffic volumes. Evidence was collected mainly from Europe, USA and Australia and appraised by type of public transport change, ie. major new corridor projects, service enhancements, fare changes and on-road priority projects.

Research Report 220 Assessing passing opportunities – stage 3

Published: | Category: Research & reports , Research programme | Audience: General

This research continues recent work to investigate ways of analysing and providing for improved passing opportunities on state highways in New Zealand. It was carried out during 2000-2001 and involved field surveys, literature review, TRARR modelling and subsequent desktop analysis. The effectiveness of no-overtaking delineation using a modified (horizontal curve) warrant criterion was assessed. Changes to Transfund New Zealand simplified procedures for passing-lane analysis were suggested to improve the robustness of the model. The use and performance of slow vehicle bays were investigated and alternative evaluation procedures developed. Various highway simulation models were assessed and a framework devised for future development of detailed rural simulation modelling on New Zealand rural roads.

Research Report 262 Employer travel plans in New Zealand

Published: | Category: Research & reports , Research programme | Audience: General

A research project was undertaken in 2001–2003 to investigate the application of employer travel plans in New Zealand. The project's focus was the identification of the most appropriate travel plan method that could be used by New Zealand organisations, and its likely impact on travel modes for the journey to work. Case study employer travel plans were facilitated at two New Zealand organisations as part of this project.

Research Report 346 The effectiveness of incident management on network reliability

Published: | Category: Research & reports , Research programme | Audience: General

This report summarises preliminary research undertaken in New Zealand during 2006–2007 to investigate the ability of intelligent transport system (ITS) treatments, such as adaptive signal control (eg, SCATS) and variable message signs (VMS), to detect and respond to serious traffic incidents, and to determine the most appropriate traffic management strategies (in terms of overall network reliability) to apply when such incidents are detected. The study involved a literature review of techniques and software/systems currently used to manage traffic congestion and respond to incidents, and an exploratory microsimulation study modelling incident detection and response in an urban network. The research found few attempts to bring together research in the three areas of incident detection/management, ITS methods such as adaptive signal control, and network reliability measures. There is also a lack of robust incident detection available at present in New Zealand.

Research Report 390 The waterproofness of first-coat chipseal

Published: | Category: Research & reports , Research programme | Audience: General

This research project, undertaken in 2006 to 2008, confirms that traffic can force water through first-coat chipseal surfacings that do not visually show signs of cracking. The research measured the change in moisture content after rain on a number of newly sealed sites. Although this testing showed a statistically significant increase in moisture over all sites, the increase was not dramatic. The research concludes that water ingress can occur where a water film collects on the pavement. The film of water can occur either through rutting of the pavements, or if the crossfall and longitudinal shape is such that a sheet of water forms above the surface texture of the pavement.

Research Report 009 Calibration of NETSIM to New Zealand conditions: an executive summary

Published: | Category: Research & reports , Research programme | Audience: General

NETSIM, a very detailed computer model for traffic simulation developed in the United States, is validated and calibrated for use in urban street networks in New Zealand conditions. It is particularly valuable for dense and complex networks where other methods are seldom appropriate.

Research Report 432 Minimum design parameters for cycle connectivity

Published: | Category: Research & reports , Research programme | Audience: General

This research used video surveillance of 1245 cyclists in New Zealand at pinch points to determine the relationship between the remaining lane or shoulder width and the likelihood of cyclists traversing the edge line into the motorised vehicle stream. Ten sites were observed in Wellington and nine in Christchurch. Sites were selected on the criteria of retained cycle space widths at short pinch points between 0.2m and 1.2m wide, variable relative heights of the objects and traffic conditions. Remote camera equipment was installed to capture cyclist behaviour immediately before and after the site. Results established that at 0.4m most cyclists could retain a course inside the edge line and navigate the pinch point without needing to enter the motorised vehicle stream. It was observed cyclists appeared to anticipate pinch points and move to avoid them gradually in a way to minimise lateral movement.