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Data Provider: Welsh Government National Statistics Recorded road accidents classified as Killed or Seriously injured (KSI) by area and year
[Collapse]Severity 1[Filtered]
Severity 2[Filter]
[Collapse]Area 1
Area 2
Click here to sort2015Click here to sort2016Click here to sort2017Click here to sort2018Click here to sort2019Click here to sort2020Click here to sort2021
[Collapse]Wales1,0329759309921,057(r) The data item has been revised since previously published in StatsWales.729865
Wales[Collapse]North Wales police force296270259314293(r) The data item has been revised since previously published in StatsWales.225253
North Wales police forceIsle of Anglesey25232634331923
Conwy5854535454(r) The data item has been revised since previously published in StatsWales.4447
Flintshire4647404651(r) The data item has been revised since previously published in StatsWales.3851
[Collapse]Dyfed Powys police force309301291295334186255
Dyfed Powys police forcePowys1151071141071217393
[Collapse]South Wales police force331305271208234132151
South Wales police forceSwansea57585451383223
Neath Port Talbot3831283222820
The Vale of Glamorgan31302817191215
Rhondda Cynon Taf54593630542734
Merthyr Tydfil1710151111104
[Collapse]Gwent police force9699109175196(r) The data item has been revised since previously published in StatsWales.186206
Gwent police forceCaerphilly32213444465550
Blaenau Gwent5131113261926
Torfaen417111920(r) The data item has been revised since previously published in StatsWales.2922



Accidents by severity, Welsh local authorities and police force areas

Last update

June 2022 June 2022

Next update

June 2023 (provisional)

Publishing organisation

Welsh Government

Source 1

Reported road accidents system, Welsh Government

Contact email


National Statistics

Lowest level of geographical disaggregation

Local authorities

Geographical coverage


Languages covered

English and Welsh

Data licensing

You may use and re-use this data free of charge in any format or medium, under the terms of the Open Government License - see

General description

The statistics refer to casualties resulting from personal injury accidents on public roads reported to the police and forwarded to the Welsh Government. Road Accident Data contains details of the accident, the number of vehicles involved and information on casualties.
Accident data contains: the description and location, the number of casualties and vehicles, severity of accident, type of road and contributory factors.
Vehicle description: includes details of vehicle type, age of driver/rider.
Casualty description: provides details of the severity of casualty, casualty class and age.
The Data Dictionary provides a detailed breakdown description of the variables that are included in all three categories.

Data collection and calculation

The police compile statistical data about road traffic accidents and casualties (called Stats19 data) for the Welsh Government and the Department for Transport (DfT). This follows police attendance at accidents that involve any personal injury, together with members of the public reporting personal injury accidents directly to the police. The figures are based on information available to the Welsh Government 14 weeks after the end of the latest quarter. The Stats19 data are a set of numeric and alphabet characters.
A casualty is defined as, a person killed or injured in an accident. One accident may give rise to several casualties. Casualties and accidents are subdivided into killed, seriously injured and slightly injured categories.
Casualties reported as killed include only those cases where death occurs in less than 30 days as a result of the accident. They do not include those who died as a result of natural causes (e.g. heart attack) rather than as a result of the accident, nor do they include confirmed suicides.
The classification of each accident is the most seriously injured casualty. For example if there are 5 casualties but only 1 fatality, the accident is classed as a fatal.

Frequency of publication


Data reference periods

2015 to 2021

Statistical quality

The figures shown may change in future if there are late amendments. Similarly, the figures for earlier years may differ from those previously published. The figures cover only road accidents reported to the police involving personal injury.
This data is obtained from administrative sources and thus may be affected by changes in procedures within those systems.
There is some possibility of under-reporting and under-recording as well as for the misclassification of accidents though these are minimised by local authorities and the Welsh Government conducting a number of data validations. For example, Welsh Government data analysts may query the location of an accident with a police force when the grid reference of an accident is in a different local authority to the one specified in the data return. These issues are discussed in more detail in a Statistical Article ‘Quality Report for Welsh Road Casualties’.
This article also summarises the sources and methods used to compile the road accident and casualty figures for Wales. It also reviews the quality of the resulting figures in terms of the six dimensions of statistical quality of the European Statistical System. The aim is to provide background information about road casualty statistics for Wales in a single document for all users of the published statistics. It is available from the following link:


Transport Road Accidents Collisions Fatal Killed Serious Slight Police Police-recorded