Report of Crash Data Quality December 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
This report contains some of the measures outlined in the documentout of scope
out of scope
. Those measures not included in this report will
eventually be contained in future reports.
Integrity
ACT 1982
Measure 1a. The percentage of crashes in which the sum of the numbers of
pedestrians and vehicles involved equals the number of parties in the crash.
This will be reported every six months and the report was run on Monday 26
January 2026.
Result 99.4%.
Tolerance: 100%.
This measure is outside the tolerance.
INFORMATION
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: 60% of all crashes.
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. 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 19 fatal crashes recorded in December 2025.
Tolerance: 90% of fatal crashes in the last month were notified within 1 working
day of a death being reported.
RELEASED UNDER THE OFFICIAL
This measure is outside tolerance.
Measure 3b. For all crashes, the time between the occurrence of a crash and the
appearance of data for it in the CAS Reporting Application for 50% of crashes,
84% of crashes and 95% of crashes, over the last two years. This is reported
every six months and the report was run on Tuesday 13 January 2026.
Result: This table shows the number of days for 50%, 84% and 95% of crashes to
be available in CAS after the occurrence of a crash, by severity.
Severity
50% 84%
95% Tolerance
Within
Tolerance?
Fatal
2
4
18
95% within 7 days
No
Serious
3
10
23
95% within 30 days
Yes
Minor
3
11
31
95% within 30 days
No
Non-injury 177
216
246
95% within 180 days No
Completeness
1982
Measure 4. The percentage of mandatory columns that are fully populated.
This is reported every six months and the report was run on Wednesday 14
ACT
January 2026.
Result: There are 85 columns which have been monitored, 84 of which are
ful y populated and 1 column (created by) where 99% of rows are NULL.
Please see Appendix 2 for the detailed results.
Tolerance: Al mandatory columns must be populated.
This result is outside tolerance.
3. Data Quality Issues
INFORMATION
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.
4. Efforts Made to Improve Data Quality The Crash Data Processing Team has cleared th
OFFICIAL e 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.
THE
Appendix 1 – Derivation of Measures
Measure 1a is reported from an out of scope run against the Data Access Layer.
Measure 1c is reported from an out of scope run against the Data Access Layer.
Measure 3a is derived from a spreadsheet of fatal crashes.
UNDER
Measure 3b is reported from anout of scope run against the Data Access Layer.
Measure 4 is reported from an out of scope run against the Data Access Layer.
Appendix 2 – Detailed Results of Completeness Report
Data Element
Percentage Null
RELEASED
recorded location
0
recorded location
0
is primary
0
direction from side road or feature
0
occurred at intersection
0
coded crash location
0
coded crash
0
gender
0
ethnicity
0
road user type
0
injury severity
0
hospitalised
0
coded crash personid
0
coded crashid
0
1982
fatality preventable safety equipment 0
used
Injury Cause
0
ACT
is dob unknown
0
is pedestrian
0
Hit By
0
Role Number
0
coded crash passenger
0
coded crash person
0
coded crash vehicle
0
restraint used
0
coded crash driverid
0
INFORMATION
driver contribution code
0
is unknown
0
vehicle type
0
Has No Plates/Unknown
0
isRegistrationPlateUnknown
0
WoF/CoF
0
OFFICIAL
damage Severity
0
general damage area
0
THE
vehicle usage
0
vehicle load
0
is Load Secured
0
too fast for conditions
0
state before crash
0
UNDER
direction of travel
0
Under Run Protection
0
Did no under run protection
0
contribute to the severity of the crash
Crash Risk Reduced By Additional
0
Reflector
coded crash v
RELEASED ehicleid
0
coded crashid
0
hasModificationsYesNoUnknownTypeid 0
is over dimension
0
crash diagram
0
road type code
0
road curvature typeid
0
road markings
0
rail crossing type
0
road gradient type
0
road surface type
0
primary surface condition
0
natural light type
0
street light status
0
junction
0
1982
traffic control
0
weather condition A
0
weather condition B
0
ACT
special purpose lane
0
movement code
0
is impacted in crash
0
coded crash id
0
tcr crash identifier
0
tcr timestamp
0
is peer review
0
is exercise
0
created by
99
INFORMATION
crash time unknown
0
crash severity
0
police event
0
police attended
0
created date time
0
OFFICIAL
cviu attended crash
0
currently unlocatable
0
is orphaned
0
THE
is Legacy
0
latest processing status
0
is weekend
0
object version
0
is complex crash
0
UNDER
isVehicleFaultyYesNoUnknownTypeid
0
driver contribution type
0
territorial local authority
0
suburb/locality
0
RELEASED
