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Research Report 591 Evaluation of the effectiveness of the NZ Transport Agency’s procurement policy

Published: | Category: Performance monitoring , Research programme , Research & reports | Audiences: Advice and assistance, General

This report presents the results of an independent evaluation undertaken by Allen and Clarke between January and July 2015 on the effectiveness of the NZ Transport Agency (the Transport Agency) procurement policy framework and its implementation by four road controlling authorities (RCAs) in physical works and professional services procurement. A review of international and national literature identified key success factors for good practice in outsourced procurement and informed the development of an evaluation framework. The Transport Agency’s policy governance and implementation by RCAs in Auckland, Ruapehu, Dunedin and Central Otago were assessed against the framework using stakeholder interviews and site document data.

Research Report 629 System dynamics investigation of freight flows, economic development and network performance

Published: | Category: Performance monitoring , Research programme , Research & reports | Audiences: General, Road traffic engineers & consultants

The purpose of this research was to investigate if and how systems dynamic (SD) modelling could be used for understanding traffic flows at an inter-regional (state highway) level, in the context of improving understanding of the relationship between economic activity, the demand for freight, and the performance of the rail and road network. We used the Auckland – Hamilton – Tauranga (AHT) triangle as a pilot case study. The research involved the design and construction of three models; two simple Bayesian vector autoregressive model to forecast economic activity and freight flows within the AHT region, and a high level SD model for simulating freight flows along the main roads in the region. The key strength, and hence the main reason for selecting an SD model for this latter task, is that time is explicit.

Research Report 641 Developing a national measure for predictable public transport: bus, rail and ferry

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

The ability to reliably predict public transport (PT) journey times is critical for network operators and transport authorities to measure, monitor and target improvements to the PT network, with flow-on effects for customers. Research conducted in New Zealand between August 2016 and August 2017 aimed to identify and develop an optimal measure for PT predictability.  This involved undertaking a local and international review of predictability/reliability measures used for PT or private vehicle travel, and included evaluation of measures. From this review, and consideration of the potential for inter-modal and inter-regional aggregation, a shortlist of three preferred measures was developed including: buffer index, modified buffer index and planning index.  Shortlisted measures were applied to a nationally aggregated set of PT travel data from across regions and PT modes.