Accessibility assessments have the potential to guide policy makers to deliver improved accessibility in New Zealand both by clarifying current implicit accessibility policy, and by setting out new explicit policies. Without a practical delivery focus modelling can quickly become unmanageable since accessibility models are not helpful if solely data driven. It is by understanding the needs of people, businesses and places that the policy context becomes clear. Demonstrating the usefulness of accessibility planning in practice will ultimately provide the fuel to drive accessibility policy.
Accessibility indicators need to include expressed, social, stated and show comparative need. Different indicators will be practical at national and local levels. A national New Zealand approach could include defining a set of destinations for which accessibility measurements are needed and then calculate the travel time from each house address point to the nearest destination of that type using defined modes and combinations of modes.
Management and audit frameworks should be clarified to ensure the analysis requirements directly support the administrative structures.
To assist the development of an accessibility modelling toolkit, it should be possible for some of the functionality from existing models to be transferred to a New Zealand situation, eg mapping of outputs and editing networks.
However, the time-consuming part of accessibility modelling is the data assembly and management, and for this it will almost certainly be more efficient and practical to automate bespoke accessibility tools to help manage the available New Zealand data.