CYCLONE GABRIELLE UPDATES: View our traffic map for the latest available information on road closures and delays(external link) and find out about closures to driver licensing sites

SCAM ALERTS: Report a phishing scam or learn about the latest phishing emails

TRAFFIC UPDATES: Several roads have been impacted by recent weather events. We’ll provide updates on our Journey Planner website as information becomes available. View our traffic map for road closures and delays(external link)

SCAM ALERTS: Report a phishing scam or learn about the latest phishing emails

CONTACT CENTRE WAIT TIMES: Our Contact Centre is currently experiencing significant wait times. View frequently asked questions

ONLINE TRANSACTIONS: We are experiencing issues with credit and debit card transactions on our website. We are working with the payment provider to resolve this as soon as we can. 

CONTACT CENTRE WAIT TIMES: Our Contact Centre is currently experiencing significant wait times. View frequently asked questions

REGO AND RUC LABEL ERROR: There was a postage error with labels purchased on the 15 August 2022. Find out more

ROAD USER CHARGES (RUC) DISCOUNT: Find out more about the temporary RUC reduction scheme

ONLINE SERVICES: We are currently experiencing issues with all our online services at the moment. We are working to resolve the services as soon as possible. We apologise for any inconvenience caused.

COVID-19 SERVICES UPDATE: Information on Waka Kotahi services, extensions and more

ONLINE SERVICES: We currently have an issue with receiving some payments and are working to resolve this issue as quickly as possible. We apologise for any inconvenience.

EASTER WEEKEND – PLAN AHEAD: Heading away for the long weekend? Check our holiday journeys tool(external link)

SCAM ALERTS: Refund email and Vehicle licence (rego) renewal phishing emails

CONTACT CENTRE PHONE LINES: Our Contact Centre phone lines are currently unavailable. View frequently asked questions

Crash Analysis System (CAS)

Waka Kotahi NZ Transport Agency manages the Crash Analysis System (CAS); New Zealand’s primary tool for capturing information on where, when and how road crashes occur.

The system provides tools to analyse and map crashes, and enables users to identify high-risk locations and monitor trends and crash sites. This information helps inform transport policy, design and prioritise road safety improvements and monitor their effectiveness.

CAS is used by a range of organisations all with the broad aim of improving road safety. It is an essential tool in supporting the Government’s road safety strategy Road to Zero. The strategy adopts a Vision Zero approach – a New Zealand where no-one is killed or seriously injured in road crashes, and where no death or serious injury while travelling on our roads is acceptable. CAS enables the transport sector over the long term, to improve road safety through knowledge, research and the measurements of the effects of changes to the network and network user behaviour.

Road to Zero(external link)

Access to CAS

CAS contains data, which is considered personal and private as defined in the Privacy Act 2020, Official Information Act 1982 and the Local Government Official Information and Meetings Act 1987.

Waka Kotahi takes the privacy and security of data very seriously. The data collected and stored is used for research and decision-making aimed at improving road safety, and as such benefits all New Zealand road users. We can also link CAS data to data from other sources to improve its usefulness to recipients.

CAS privacy statement

Access to data is available in three different ways:

  1. Online - open data in the form of Excel or .csv files and maps.
    CAS open data portal(external link)

  2. Bespoke reports created by Waka Kotahi, based on customer requirements. These are usually for low frequency, complex or one-off requests, or for data that is unavailable using direct access. Where appropriate, the provision of data as bespoke reports containing private information or via direct access to the system will require a data agreement, which places obligations on users to handle this information appropriately and in accordance with the law.
    For any specific requests for information from CAS, email

  3. Direct access to the system. This is only available to approved users, usually for high frequency on-going needs and may only be granted for one or more of the following purposes:
    • informing transport policy and regulations
    • designing and prioritising a range of road user behaviour and road safety initiatives
    • supporting funding applications for network and road safety improvements
    • monitoring and evaluating the effectiveness of road safety initiatives
    • providing statistics to support a wide range of public information requests
    • providing information for research purposes connected with road network user behaviour, road safety and transport policy
    • administering the Crash Analysis System (Waka Kotahi and approved contractors only).

Apply for direct access to CAS

Processing of crash data

Crash Analysis System (CAS) data availability, upon receipt of a traffic crash report with sufficient and consistent information*

Type of crash




Data available in CAS

1 working day

1 working day

Up to 5 months

* As at 1 December 2022

Tools and resources

CAS differences in data between the current and previous system

Causative and contributory factor codes [PDF, 125 KB]

Vehicle movement codes [PDF, 3.5 MB]

Using the RSRP Map search tool to make a buffer on a state highway (effective from 22 September 2022) [PDF, 226 KB]

Tips for using sites and making collision diagrams(external link)

Known CAS issues and requests for improvements

How to get help with CAS

  • Learn how to use CAS with the online training portal CAS Learn. Courses include overviews of query functionality, using maps, reporting functionality, and using collision diagrams.
    CAS Learn(external link)
  • For advice or help on any specific queries, email
  • For any password or connectivity issues, phone the Waka Kotahi NZ Transport Agency Service Desk on 0800 805 263.