Research funded by the New Zealand Transport Agency provides guidance on when and how to carry out an integrated transport assessment.

This research provides a methodology for assessing the effects of a development proposal within the context of the New Zealand regulatory structure. The integrated transport assessment (ITA) guidelines are based on the varying scopes of assessment (simple, moderate, broad and extensive). The possible content for each ITA assessment type and the matters to be discussed are described, as is the process for how the ITA is to be undertaken. The practice notes were developed from 2008 to 2010, and include information on how to undertake site trip generation surveys, how to estimate design trip generation rates for retail activities, some relevant case law and a discussion of the permitted baseline.