The transport teams at Christchurch City Council use a variety of tools and information to predict, as accurately as possible, the future demands on the transport network.

Two of the models which are used to simulate transport flows are the Christchurch Transport Model (CTM) and the Christchurch Assignment and Simulation Traffic model (CAST).

Christchurch Transport Model (CTM)

The CTM is owned by the Urban Development Strategy (UDS) partners: NZTA, ECan, Christchurch City Council, Waimakariri District Council, Selwyn District Council and Ngāi Tahu. 

It allows users to forecast changes to the transport network resulting from development across the Greater Christchurch region for all modes of transport. This information helps guide planning decisions for the city and region.

The CTM is freely available for anyone who wishes to use it. The model runs on the CUBE operating system. The model is developed and maintained by the UDS group and copy of the latest model can be obtained from any UDS stakeholders.

Christchurch Assignment and Simulation Traffic Model (CAST)

The CAST model allows transport engineers to analyse the specific transport effects of individual developments. CAST uses the data from CTM to provide information specific to different areas of the city.  This means individual suburbs and blocks can be modelled more accurately than using CTM. As with the CTM, CAST allows for different development scenarios, allowing the comparison of the transport impacts of each scenario.

The CAST model was developed on behalf of Christchurch City Council. It is used within the Council to help shape the future transport network.

The private sector uses it to predict the transport effects of new developments. This would be appropriate for a resource consent when a full Integrated Transport Assessment is required or for Plan Change applications.

The advantage of using CAST for transport modelling is that the data is developed and maintained by the Council reducing the onus on private consultancies of maintaining a transport model. Where it is used for development applications, the model provides certainty that the data provided is a true reflection of the situation.

The Council has made CAST available for anyone to use at no cost. The CAST model operates on the SATURN modelling software.

Note: The City Council also welcomes the use of other transport models for resource consent and Plan Change applications. Independent models will require verification by Council staff before any findings are accepted.

Parking model

A parking model has also been prepared as part of the Christchurch Central Parking Plan (2015). The parking model is a live document with a supporting technical report which identifies the likely locations and quantity of parking facilities needed to support key destination areas in the Central City out to 2041.

The primary data in the model is the long term land use forecast featured in the Central Christchurch Recovery Plan and the Greater Christchurch Urban Development Strategy. The land use forecast shows the expected increase in the number of people living, working and visiting the central city. The data also provides indicative floor areas for a range of activity types as well as the forecast number of jobs associated with each activity. The model provides the capability to assess the effects of different levels of parking supply, both on-street and off-street.

The parking model is Council-owned. A management protocol is being developed for the model so that it can be made available to model users.

To obtain a copy of the latest CTM or CAST model or for further information on the parking model please contact the Council’s Asset Network and Planning team on telephone 03 941 8999.