Accident: Involves personal injury occurring on the public highway (including footways) in which at least one road vehicle or a vehicle in collision with a pedestrian is involved and which becomes known to the police within 30 days of its occurrence. The vehicle need not be moving and accidents involving stationary vehicles and pedestrians or users are included. One accident may give rise to several casualties. "Damage only" accidents are not included in this publication.
Adults: Persons aged 16 years and over (except where otherwise stated).
Agricultural vehicles: Mainly comprises agricultural tractors (whether or not towing) but also includes mobile excavators and front dumpers.
Built up roads: Accidents on "built up roads" are those which occur on roads with speed limits (ignoring temporary limits) of 40 mph or less. "Non built up roads" refer to speed limits over 40 mph. Motorway accidents are shown separately and are excluded from the totals for built up and non built up roads.
Buses and coaches: Buses or coaches equipped to carry 17 or more passengers, regardless of use.
Cars: Includes taxis, estate cars, three and four wheel cars and minibuses except where otherwise stated (i.e. Tables 22, 27, 28, and 40). Also includes motor caravans prior to 1999.
Casualty: A person killed or injured in an accident. Casualties are sub-divided into killed, seriously injured and slightly injured. One accident may give rise to several casualties therefore the total number of casualties may be higher than the total number of accidents.
Children: Persons under 16 years of age (except where otherwise stated).
Darkness: From half an hour after sunset to half an hour before sunrise, i.e. "lighting up time".
Daylight: All times other than darkness.
DfT: Department for Transport
Drivers: Persons in control of vehicles other than pedal cycles, motorcycles and ridden animals (see riders). Other occupants of vehicles are passengers.
Failed breath test: Drivers or riders who were tested with a positive result, or who failed or refused to provide a specimen of breath (see note on Table 11 in "Notes to individual tables" for the coverage of breath test data).
Fatal accident: An accident in which at least one person is killed.
First point of impact: The place on the vehicle that first impacted another vehicle or road user.
Goods vehicles: These are divided into two groups according to vehicle weight. They include tankers, tractor units without their semi-trailers, trailers, articulated vehicles and pick-up trucks.
Heavy goods vehicles (HGV): Goods vehicles over 3.5 tonnes maximum permissible gross vehicle weight (gvw).
Hit object: A record of any objects hit on or off the carriageway by the vehicle.
Journey purpose: The reason the person was travelling to their destination (commonly other/unknown).
Light goods vehicles (LGV): Goods vehicles, mainly vans (including car derived vans), not over 3.5 tonnes maximum permissible gross vehicle weight.
Injury accident: An accident involving human injury or death.
Killed: Human casualties who sustained injuries which caused death less than 30 days (before 1954, about two months) after the accident. Confirmed suicides are excluded.
KSI: Killed or seriously injured.
Light Goods Vehicle (LGV): see Goods vehicles
Motorcycles: Two wheel motor vehicles, including mopeds, motor scooters and motor cycle combinations.
Motorways: Motorway and A(M) roads.
Other roads: All B, C and unclassified roads, unless otherwise noted (i.e. Tables 5a-c).
Other vehicles: Other motor vehicles include ambulances, fire engines, trams, refuse vehicles, road rollers, agricultural vehicles, excavators, mobile cranes, electric scooters and motorised wheelchairs etc, except where otherwise stated (i.e. Tables 28 and 40). Other non motor vehicles include those drawn by an animal, ridden horse, wheelchairs without a motor, street barrows etc, except where otherwise stated (i.e. Tables 28 and 49). In certain tables "other vehicles" may also include buses and coaches and/or goods vehicles, as indicated in a footnote.
Passengers: Occupants of vehicles, other than the person in control (the driver or rider). Includes pillion passengers.
Pedal cycles: Includes tandems, tricycles and toy cycles ridden on the carriageway. From 1983 the definition includes a small number of cycles and tricycles with battery assistance with a maximum speed of 15 mph.
Pedal cyclists: Riders of pedal cycles, including any passengers.
Pedestrians: Includes children riding toy cycles on the footway, persons pushing bicycles, pushing or pulling other vehicles or operating pedestrian controlled vehicles, those leading or herding animals, children in prams or buggies, and people who alight safely from vehicles and are subsequently injured.
Riders: Persons in control of pedal cycles, motorcycles or ridden animals. Other occupants of these vehicles are passengers.
Road users: Pedestrians and vehicle riders, drivers and passengers.
Rural Roads: Major roads and minor roads outside urban areas and having a population of less than 10 thousand. .Motorways in rural areas are shown separately and (with the exception of Tables 23a, b and c) are excluded from the totals for rural roads.
Serious accident: One in which at least one person is seriously injured but no person (other than a confirmed suicide) is killed.
Serious injury: An injury for which a person is detained in hospital as an "in patient", or any of the following injuries whether or not they are detained in hospital: fractures, concussion, internal injuries, crushings, burns (excluding friction burns), severe cuts, severe general shock requiring medical treatment and injuries causing death 30 or more days after the accident. An injured casualty is recorded as seriously or slightly injured by the police on the basis of information available within a short time of the accident. This generally will not reflect the results of a medical examination, but may be influenced according to whether the casualty is hospitalised or not. Hospitalisation procedures will vary regionally.
Severity: Of an accident; the severity of the most severely injured casualty (either fatal, serious or slight). Of a casualty; killed, seriously injured or slightly injured.
Slight accident: One in which at least one person is slightly injured but no person is killed or seriously injured.
Slight injury: An injury of a minor character such as a sprain (including neck whiplash injury), bruise or cut which are not judged to be severe, or slight shock requiring roadside attention. This definition includes injuries not requiring medical treatment.
Speed limits: Permanent speed limits applicable to the roadway.
Taxi: Any vehicle operating as a hackney carriage, regardless of construction, and bearing the appropriate district council or local authority hackney carriage plates. Also includes private hire cars.
Users of a vehicle: All occupants, i.e. driver (or rider) and passengers, including persons injured while boarding or alighting from the vehicle.
Urban Roads: Major and minor roads within an urban area with a population of 10 thousand or more. The definition is based on the 1991 Office of the Deputy Prime Minister definition of urban settlements. The urban areas used for this bulletin are based on 2001 census data. Motorways in urban areas are shown separately and (with the exception of Tables 23a, b and c) are excluded from the totals for urban roads.
Vehicles: Vehicles (except taxis) are classified according to their structural type and not according to their employment or category of licence at the time of an accident.
Vehicles involved in accidents: Vehicles whose drivers or passengers are injured, which hit and injure a pedestrian or another vehicle whose driver or passengers are injured, or which contributes to the accident. Vehicles which collide, after the initial accident which caused injury, are not included unless they aggravate the degree of injury or lead to further casualties. Includes pedal cycles ridden on the footway.

Supplementary Data

Northern Ireland data is not provided proactively and has been obtained through an FoI request. Currently this means the amount of information available is restricted compared to the GB data. Date, time, location, speed limit and road type are all available. In addition information about vehicle types, driver gender, age band, and vehicle manoeuvre are provided together with similar information about any casualties.

Where collision descriptions have been provided by an authority or police force this is typically recorded by a police officer either attending the scene, or at the station by a member of the public. This text is often in abbreviated form and will almost certainly have been recorded immediately following the collision. This statement is merely the opinion of the officer recording the details of the collision and does not reflect the result of an in-depth collision investigation.