Report of Crash Data Quality November 2025
1. Introduction
This report will be issued monthly. Some measures will be reported every month
whereas others will be reported every six months.
2. Routine Measures
out of
This report contains some of the measures outlined in the document scope
out of scope
. Those measures not included in this report will
eventually be contained in future reports.
Integrity
ACT 1982
Measure 1c. The percentage of drivers in crashes against whom alcohol above
the limit or blood refused was coded, who had an alcohol reading above the
limit or who refused to give a blood sample.
Result: 65% of all crashes, 93% of crashes recorded in November 2025.
Tolerance: 100% of drivers who had an alcohol reading above the limit or who
refused to give a blood sample.
This measure is outside tolerance.
INFORMATION
Currency
Measure 3a. For fatal crashes, the average time, in working days, between the
first occurrence of a death (the death being one that is included in the official
road death statistics) from a crash to the distribution of a fatal crash notification
from the NZ Transport Agency for that crash during the last month (1 November
to 30 November 2025). This is reported monthly.
Result: 1.05 working days (all but two crashes were notified within 1 working
day) but there were 20 fatal crashes recorded in November 2025.
Tolerance: 90% of fatal crashes in the last month were notified within 1 working
day of a death being reported.
This measure is within tolerance. 3. Data Quality Issues
Here is a link to a list of known crash data quality issues:
out of scope
.
Changes made since October 2024 are highlighted in yellow.
Appendix – Derivation of Measure
Measure 1c is found from an SQL script run against the Data Abstraction Layer.
RELEASED UNDER THE OFFICIAL
The script was run on 06/12/2025 for all years and on 08/12/2025 for
November 2025.
Measure 3a is derived from a spreadsheet of fatal crashes.
4. Efforts Made to Improve Data Quality The Crash Data Processing Team has cleared the backlog of non-injury
crashes. Data for most non-injury crashes is now available in CAS within one
month of the occurrence of a crash.
1982
ACT
INFORMATION
OFFICIAL
THE
UNDER
RELEASED
