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Research Report 500 Strategic electronic monitoring and compliance of heavy commercial vehicles in the upper North Island

Published: | Category: Sustainable land transport , Research programme , Research & reports | Audience: General

This research report on the strategic electronic monitoring of heavy commercial vehicles (HCVs) was prepared by Traffic Design Group in 2011–12. The aim of the research was to provide a conceptual framework within which technology systems could be operated at strategic, tactical and operational levels. The goal is to improve national productivity, by maximising efficiency for transport operators and enforcement staff alike, improving road safety, improving protection of road and bridge assets and creating a fairer economic environment through greater compliance with HCV legislation. Overloaded HCVs create significant additional wear and tear, damage and even reduce the economic lift of New Zealand’s roads and highways. Overloaded vehicles do not pay for the additional tonnes they carry, leaving the considerable extra maintenance and renewal costs to be unfairly borne by operators who pay their correct share of road user charges.

Research Report 240 The economics of travel for education in New Zealand

Published: | Category: Transport demand management , Research programme , Research & reports | Audience: General

A study undertaken in 2001–02 on the economics of travel for education had the following objectives:

to gain a better understanding of travel to school and its contribution to urban traffic volumes
to examine alternatives to car use for travel to school, and to assess their likely costs and benefits
to ascertain the impediments to switching travel modes. UK and US experiences of travel to school and its effect on traffic flows are reviewed, and the contribution of school trips to the traffic flows of Wellington and Auckland is ascertained. The arrangements for school bus services in New Zealand are outlined and issues determining the choice of travel mode are discussed. An economic evaluation of encouraging the use of alternatives to private car for education travel is attempted, based as it is on the best, albeit limited, available data.

Research Report 058 Seismic assessment of New Zealand highway bridges: development and testing of preliminary screening procedures

Published: | Category: Natural hazard risk management , Research programme , Research & reports | Audience: General

A preliminary screening procedure for the prioritisation of New Zealand State Highway bridges is presented. The procedure is designed to identify bridges which justify detailed assessment of their earthquake resistance. The derivation of the procedure is described and the source material is listed. The results of a pilot application carried out in 1994 of a preliminary version of the screening procedure are presented. The pilot application considered 29 bridges on State Highway 1 between Bulls and Wellington, North Island.  

The results from the screening procedure were compared with those from an economic analysis which used base data from an approximate structural assessment.  The comparison led to some modifications being made to the preliminary procedures to produce the final version. Results of the comparison and details of the modifications are presented. Keywords: Assessment, bridge, earthquake, highway, road, seismic, New Zealand

Research Report 011 Emulsified bituminous materials in road maintenance and construction: a survey of current New Zealand practice

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

Bitumen emulsions are now being used in almost every application in which hot, cut-back or fluxed bitumen binders are used. A survey of current practice in New Zealand for road maintenance and construction from 1987 to 1991 is recorded. Experience ranges from using bitumen emulsion for maintenance, tack coat, sealing, and slurry applications for State Highways, City streets and Council roads, and in Transit New Zealand regions. Binder performance of bitumen in general is discussed, with particluar reference to the effects of heat, oxidation, cutter and luxing stocks, and emulsification. Acceptance criteria for bitumen emulsions are specified in terms of stability, curing characteristics, and resistance to stripping. The summary provides volumes of bitumen used annually in New Zealand, applications used for bituminous emulsions, comparison of costs of hot bitumen with those of bitumen emulsions, as well as lists of benefits and limitations of bitumen emulsions.

Research report 436 Benefits of new and improved pedestrian facilities - before and after studies

Published: | Category: Transport demand management , Research programme , Research & reports | Audience: General

Walking is an essential mode of transport. New and improved pedestrian facilities promote walking and provide greater access and mobility within our communities. The NZ Transport Agency has recently updated the procedures for the evaluation of pedestrian improvement projects. The benefit factor applying to new pedestrian trips was increased from $0. 50 to $2. 70/km, making pedestrian facility improvement projects more economically viable. Thus, estimating the increase in pedestrian flows (as opposed to simply recording existing pedestrian flows) is now important in the economic evaluation of new or improved facilities. This research analysed case studies at eight New Zealand sites where the implementation of new pedestrian facilities (or the improvement of existing facilities) led to increased pedestrian usage and improved perception of the sites. The study recorded pedestrian rates both before and after facility implementation, and analysed accompanying factors such as safety, delay and directness.

Research Report 307 Fatigue design criteria for low noise surfaces on New Zealand roads

Published: | Category: Activity management , CAPTIF , Research programme , Research & reports | Audience: General

Internationally low noise porous asphalts are typically laid on top of structural asphalt layers. In New Zealand structural asphalt is generally prohibitively expensive and porous asphalt is used directly on chipseal-surfaced unbound granular pavements. Two accelerated pavement tests were undertaken at the Canterbury Accelerated Pavement Testing Indoor Facility (CAPTIF) in 2004–2005. The first test was to develop a horizontal tensile strain versus fatigue life curve and establish a relationship between basecourse surface curvature and fatigue life. The second test evaluated the extension of fatigue life by short trafficking before surfacing rather than using enhanced binders in porous asphalt. The outcomes of the project suggest that the Austroads Rehabilitation Design Guide is very conservative in predicting fatigue and that deformation leads to surface failure before fatigue of the pavement occurs. Pavements to be sealed with low noise surfaces could tolerate more deflection if initial trafficking was undertaken.

Research Report 634 Effect of road seal type on resistance to traffic stresses

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

This report details research carried out from 2016 to 2017 as the preparatory stage of a larger programme to understand how chipseals may be improved to withstand increases in horizontal shear forces imposed by traffic loadings. The research aimed to develop an understanding of mechanisms and factors that lead to chip loss resulting from surface shear stresses, and to develop a methodology for testing seal performance under realistic but controlled laboratory conditions. The report commences with a literature review to collate and examine existing data and experience on seal selection and chip loss processes from New Zealand and overseas. Physical mechanisms, site and vehicle factors that contribute to seal damage are also investigated. Finally, an experimental test method and plan is developed to quantitatively compare and evaluate the effect of seal and binder type on overall seal performance in the laboratory, but under realistic loading and temperature conditions.

Research report 657 Human factor considerations for a licensing point system

Published: | Category: Health and safe people , Research programme , Research & reports | Audience: General

The NZ Transport Agency sought to better understand how licensing point systems (LPSs) operate, including how different population groups respond to LPSs

A literature review provided a theoretical background for understanding the functions of LPSs and factors that may influence LPS effectiveness. The LPSs that exist worldwide were studied to identify the features of a ‘best-practice’ system. The Transport Agency offence data for all New Zealand-licensed drivers from 2005 to 2014 was analysed to explore how individuals and cohort drivers respond to licensing points, and to identify factors that impact on the likelihood of multiple offending. An on-line survey of a representative sample of 999 New Zealand adult car-licence holders and focus groups with four key road-user groups (young novice drivers, Māori drivers, professional drivers and motor cyclists) were conducted to investigate knowledge of, and attitude toward, the LPS, as well as acceptability of possible refinements.

Research Report 648 A pilot study to determine the relative value of non-market transport impacts of investment

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

This research project examined whether a single new survey, and analysis of the data, could be used to obtain robust values for the monetary value of statistical life, prevented injuries, travel time savings, trip reliability and congestion. A review of approaches used elsewhere was followed by the design of a choice modelling survey and two rounds of initial testing. This was used to develop a pilot survey with an efficient experimental design, and implemented online and face-to-face with 72 people. The data was analysed to produce statistically significant values for all parameters. This suggests it is worthwhile proceeding with the design and implementation of a full survey with more participants. The survey described in this report, with the suggested changes, would be a suitable basis for such a survey and analysis. Keywords: choice modelling, non-market valuation, reliability, survey design, value of statistical life, value of time.