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Data Provider: Welsh Government National Statistics Recorded road accidents by area and year
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Wales[Collapse]North Wales police force2,5012,6422,6292,6212,8022,7822,7672,6562,5032,4892,3742,1961,8742,0701,9221,9561,7241,6951,6001,5351,4451,415
North Wales police forceIsle of Anglesey204228213235234275223225196203175148151171146119143118125101106108
[Collapse]Dyfed Powys police force1,6881,8421,6321,6621,6891,6831,6801,6691,7351,7561,8451,9131,7511,8021,7661,5601,5421,4541,4071,4121,2311,249
Dyfed Powys police forcePowys468515443476475471453455510518540555493549506444435422404401355389
[Collapse]South Wales police force4,2004,4414,2674,2904,0983,8353,7003,6373,8103,9114,0553,9283,8583,7083,5723,2082,8802,8052,7152,2832,3452,328
South Wales police forceSwansea960982888988903780710742809762826841823894742709593698618464473459
Neath Port Talbot467464453452417463402426413410425387450441417342310320284263259237
The Vale of Glamorgan384418385316328312323300305350364351353262276239257217241210207213
Rhondda Cynon Taf696695766750703609525459614642684675600600682570489436479394431407
Merthyr Tydfil1451981832111641601941711751782051571471491351301041151129793115
[Collapse]Gwent police force1,6571,6111,7481,7151,6621,7241,7491,6261,4641,5441,4701,4981,2271,1211,0791,060980896712741874884
Gwent police forceCaerphilly456433488425426415441438379408436410327302291294246223175191224206
Blaenau Gwent18916919516916019115917318117813416416216714514411410984100106100



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


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

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: