44 Bowen Street
Private Bag 6995
Wellington 6141
New Zealand
T 64 4 894 5400
F 64 4 894 6100
www.nzta.govt.nz
28 May 2026
Nigel Gray
[FYI request #34723 email]
REF: OIA-22224
Dear Nigel
Extension of time to respond to request made under the Official Information Act 1982
Thank you for your email of 17 May 2026 requesting the fol owing information under the Official
Information Act 1982 (the Act):
1. Research, studies, or analysis held by Waka Kotahi Please provide all documents,
reports, internal analyses, briefings, memos, emails, or data extracts relating to:
The relationship between traffic‑
signal outages (planned or unplanned) and
traffic‑
crash frequency or severity.
[…]
2. International evidence held or reviewed by Waka Kotahi Please provide:
Any literature reviews, international research summaries, or comparative
assessments relating to crash risk during traffic‑
signal outages.
[…]
3. Data held on traffic‑
signal outages
For the period 1 January 2010 to the present, please provide:
Any datasets, logs, or records of traffic‑
signal outages, including date, time, duration,
and location.
Any metadata describing how outages are recorded, categorised, or stored.
Any documents describing how outage data is used operational y or analytical y.
[…]
4. Crash Analysis System (CAS) capability and limitations Please provide:
The list of CAS variables relevant to intersections and traffic‑
control devices.
[…]
5. Internal consideration of the issue
Please provide any documents, emails, or internal discussions relating to:
Whether Waka Kotahi has ever considered studying the safety impact of
traffic‑
signal outages.
[…]
6. Future plans or system upgrades
Please provide:
Any planned or proposed upgrades to traffic‑
signal monitoring systems.
[…]
7. Clarification of responsibilities
Please identify:
Which agency or agencies are responsible for monitoring, recording, and analysing
traffic‑
signal outages.
[…]
This letter is to advise you that NZ Transport Agency Waka Kotahi (NZTA) is extending the 20
working days available to respond to your request, as allowed for under section 15A of the Act.
We require an additional 20 working days and will send you a response on or before 14 July
2026.
The deadline is being extended as your request necessitates a search through a large quantity of
information and meeting the original time limit would unreasonably interfere with our operations.
During this time, we will be collating information in relation to part 3 of your request regarding the
location, date and time of outages. This information will then be used to inform whether further
data, such as crash statistics, can be provided.
Under section 28 of the Act, you have the right to complain to the Ombudsman about the
extension. More information about the Ombudsman is available online at
www.ombudsman.parliament.nz.
If you would like to discuss the extension with NZTA, please email the Ministerial Services team
via email to [NZTA request email].
Yours sincerely
Josh Driscoll
Manager, Ministerial Services
