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Data Provider: Welsh Government National Statistics Recorded road accidents classified as Killed or Seriously injured (KSI) by area and year
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Area 2
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Wales[Collapse]North Wales police force416422413434421368375333301271305295201228282359313276326287310361
North Wales police forceIsle of Anglesey49433649324029322528311828262628432631302436
[Collapse]Dyfed Powys police force496489430433421397481460466424441408322324310301295275314280248282
Dyfed Powys police forcePowys13515014312312311614415616913315013012010810610410210112210087115
[Collapse]South Wales police force486467418467386332342390347378413395391428381342310286304236285331
South Wales police forceSwansea94806873392444585759646484897571686266486266
Neath Port Talbot43392946404148504553452747615645404033293138
The Vale of Glamorgan59515252403433313541544825383640392124232939
Rhondda Cynon Taf979310510488646689779010611772816554464752456150
Merthyr Tydfil2823142816251418101121812141915151913181324
[Collapse]Gwent police force350398416424313266273253241242194204191170194189143114138103157127
Gwent police forceCaerphilly78736589564774706956455361496152363130314226
Blaenau Gwent49515443282831382320181621272825171416121612



Accidents by severity, Welsh local authorities and police force areas

Last update

July 2020 July 2020

Next update

Not updated

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

1993 to 2014

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