Case Study – Impact Speed & Animation
GBB was asked by the Claimant’s solicitors to review documents relating to a collision where it was reported that a Subaru Impreza (Defendant) and a Ford Fiesta (Claimant) had come into a collision at a junction.
Our instructions were to determine the most likely speeds of the vehicles at impact based on the vehicles’ damage and rest positions.
What We Did
The site of the incident was inspected and a scene plan was produced.
The involved Subaru had sustained two impacts: the first with the involved Ford and the second with a tree.
The distances that the vehicles travelled post impact were used along with their respective masses to determine the most likely speed of the vehicles at impact.
GBB used a method known as ‘Planer Impact Mechanics’, which utilises equations based on the Laws of Physics to determine the most likely speeds involved.
The GBB expert produced a detailed report that showed where the vehicles would most likely have come to rest at various speeds. The results were shown illustrated on the scene plans and as an animation.
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The calculations indicated that the involved Ford was most likely travelling at less than 10 mph and the Subaru at around 50 mph in an area subject to a 30 mph speed restriction.
Prior to trial the Defence had offered to settle on a 50/50 basis.
The GBB expert presented their evidence in court which was accepted in full by the Court and the judge ruled 70/30 in favour of the Claimant.