The three tiers of categorisation for Collisions and Casualties are: Slight, Serious, and Fatal.

Collision Severity is determined by assessing the most severe injury that occurred in a collision. It categorises the incident into classifications based on the extent of the most significant injury sustained by any individual involved in the collision.

Casualty Severity, on the other hand, refers to the classification of injuries sustained by individuals involved in a road traffic collision. This measure considers the specific injuries each casualty sustains.

For example, in a collision involving two vehicles with four individuals in total, if one person sustains a ‘Serious’ injury while the other three have ‘Slight’ injuries, the entire incident is classified as a ‘Serious Collision.’ This results in the classification of one ‘Serious’ Casualty and three ‘Slight’ Casualties. This method ensures that the severity of the collision is accurately reflected based on the most severe injury sustained.

 

Average Value of Prevention of Road Collisions by Severity and Element Cost – 2023

Below is a table showing the UK Government’s Department for Transport’s monetary assessment of road collisions. While the average value of collision prevention based specifically on Jersey data has not been calculated, this assessment still provides a good measure of the community benefits in reducing collisions.

UK Department for Transport – WebTag Data

Collision Severity

Total (£)

Fatal

£2,862,841

Serious

£327,890

Slight

£33,294