The TRL Expert Witness and Investigations Team

With comprehensive coverage of the UK, the TRL Expert Witness  and Investigations Team delivers unrivalled experience in all areas of incident investigation, for public and private sector clients including solicitors, insurers, police and government bodies in both Criminal and Civil proceedings.

Working from offices across the country our team of specialists have a track record in providing a responsive service, mobilising expert resources rapidly to gather evidence. We have many long standing repeat clients in the UK and abroad who trust our high calibre team.

Collision investigation and reconstruction

Investigation of road traffic and other incidents demands the highest levels of thoroughness and technical accuracy. Our accident reconstruction reports are known to provide clear, balanced and reasoned opinion.

Our team are able to provide preliminary independent and impartial advice to assist our clients in determining how to proceed with a case. We can review police and other expert reports and findings to provide an early indication of stance on liability. 

Rapid response scene and vehicle inspections

Evidence deteriorates rapidly at incident scenes due to the weather, traffic flow or essential repair work. The environment in which vehicles are kept after an incident can also affect continuity and quality of evidence. This scene and vehicle data can be crucial in the resolution of serious injury claims as it provides independent factual evidence as to the circumstances of the incident.

On receipt of a new instruction, we aim to collect all available incident evidence within days enabling us to record perishable evidence at the scene and capture short-lived marks on vehicles, such as contact marks from pedestrians. This also provides a greater likelihood of capturing details such as mirror positions on HGVs before vehicles are restored to service

Expertise in every aspect of transport and technology

The Expert Witness and Investigations team sits within the Engineering & Technology division at TRL, which is at the forefront of research into new vehicle technology. This includes carrying out research and providing consultancy advice on cutting-edge new topics such as autonomous vehicles, connected transport and the analysis of on-board electronic vehicle data. Because of TRL’s scale and range of transport expertise, our accident reconstruction team have access to a large range of experts in all aspects of transport research including new technologies, vehicle design, regulations, biomechanics expertise, highways engineering and human factors. We can call on experienced specialists from within our own organisation to contribute niche technical and scientific knowledge where it is needed.

Clear communication and reporting

We have a particular reputation for producing high quality, concise and clear reports. Our Expert Witness and Investigations team is long established and we have developed best practice techniques and structures to ensure consistent high standards in every investigation. We have a thorough technical review process to ensure accuracy and independence. During the investigation process, we provide regular updates on progress.

Legal, court and insurance track record

Our accident reconstruction experts are assured and experienced at giving evidence in Civil, Criminal and Coroner’s court proceedings as well as Public Inquiries. TRL experts are world renowned in their field, delivering respected, quality evidence in some of the highest profile cases.

We have expertise in all aspects of accident investigation including:

  • Collision reconstruction of single or multi-vehicle incidents involving all vehicle types
  • Interpretation of physical evidence, including road markings, vehicle damage, vehicle position, vehicle motion and impact dynamics
  • Surveying, laser scanning and scene plans
  • Mechanical vehicle inspections
  • Vehicle diagnostics
  • Highway engineering, maintenance and infrastructure design
  • Performance of safety barriers
  • Vehicle safety systems and crashworthiness
  • Workplace incidents, risk assessments and best practice
  • Analogue and digital tachograph analysis
  • Seat belts, helmets and injury causation
  • Child restraint systems
  • Injury mechanisms and mitigation
  • Vehicle data retrieval and analysis, including telematics, infotainment systems and Event Data Recorders
  • Pedestrian impacts, specifically with respect to pedestrian movement and vehicle impact speeds
  • Human factors, looking at attitudes and behaviour
  • Motorsport incidents, including reviews of track safety and design
  • Driver and vehicle visibility assessments
  • Computer simulation to provide a 3D visual presentation of results and findings
  • Video and photographic analysis
  • Physical testing and forensic component analysis
  • All types of reporting including letters of advice, Court compliant reports and Joint Expert Statements
  • Presenting evidence at all levels of the judiciary system

Our Projects:

Road Accident In-Depth Study (RAIDS)

Department for Transport (UK)

Reduction In Fatal Road Casualties

Surrey County Council

Surrey, UK
Event Data Recorders for road safety

European Commission (DG Move)


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