Motor Vehicle Accident Expert Witness

Forensic Engineers for Truck & Car Accident Analysis & Reconstruction  – Australia Wide Service

Gilmore Engineers specialises in forensic engineering and providing high-quality mechanical engineering analysis and reconstruction services for motor vehicle accidents across Australia.


With over 30 years of experience in the field, our team of skilled mechanical engineers is well-equipped to analyse and reconstruct accidents involving single or multiple vehicles, vehicle rollovers, or component failures, regardless of their complexity.


Our Abilities

Our engineers are not just limited to accident reconstruction but also possess the expertise to calculate pre-incident speeds, estimate stopping distances, analyse skid marks, determine field of vision of drivers, and determine pre-impact vehicle positions.
These skills enable our team to provide comprehensive analysis and insights into the causes and contributing factors of a motor vehicle accident, allowing for an informed understanding of the event.


Court Cases 

Lawyers often seek our services for accident analysis, particularly when there are claims for serious personal injury or death, significant property damage, or their clients are being charged with a serious offence. Our analysis and reports can provide essential evidence in court cases, helping to support legal arguments and provide valuable insights into the circumstances surrounding an accident.

We have provided over 1,500 reports to the legal profession for cases before the District, Supreme, and Federal Courts.

Our Process

Our process begins with an engineering assessment in the form of a verbal opinion after examining the evidence available. If required, this opinion can be provided as a comprehensive report for the Court. Our experts can then follow through by presenting their evidence to the Court in person on your behalf, providing valuable insights and supporting legal arguments with solid evidence. 

We have experience with

– car accident reconstruction, investigation, analysis

– truck accident investigation, analysis and reconstruction

– motorcycle accident reconstruction, investigation and analysis

– other motor vehicle accident reconstruction and cause analysis


Gilmore Engineers has the experience and expertise to provide you with the best possible service. We are committed to maintaining the highest standards of professionalism, ethics, and quality in all aspects of our work. With a proven track record of delivering outstanding results, we are confident in our ability to meet your accident reconstruction needs. 


Gilmore Engineers is a mechanical engineering consultancy firm in Brisbane with experience with car accidents. Contact us today to learn more about our services and how we can assist you with your accident reconstruction needs.


Reports Contain

  • Pre-incident speed analysis
  • Passenger car head-on impacts
  • Vehicle rollover
  • Skid mark analysis
  • Head light and tail light on / off analysis
  • Pedestrian impacts
  • Determination of seat belts being used
  • Stopping distances calculation
  • Position of vehicle pre-impact
  • Motorcycle and Bicycle impacts
  • Tyre, suspension, brakes, steering and other component failure

Remote Accident Inspections

Gilmore Engineers implemented new technology in response to pandemic travel restrictions. This enables remote inspections and virtual meetings. Virtual options save a significant amount in travel time and costs; so they remain an option now that normal travel has resumed.

Contact an Expert Now

 Phone 07 3853 5250


Motor Vehicle Accident Case Studies


Car Accident – Vehicle Speed

The driver of a motor vehicle involved in a collision was charged with dangerous driving causing death. A critical aspect of the case was the claimed speed of the vehicle before the impact. Our engineer was able to review the available evidence and determine the likely speed range of the vehicle based on tyre skid marks left at the incident scene, measured road friction, slope, and the impact damage.

Motorcycle Accident – Fatality

After a motorcycle fatality in Brisbane, one of our engineers was engaged to act as an expert witness in the case. The driver whose vehicle struck the motorcycle claimed not to have seen the motorcycle until moments before impact. Our expert engineer examined the incident site and his motorcycle accident analysis was able to provide robust evidence as to the contributing factors that could have made the motorcycle difficult to perceive, leading up to the incident.

​Car Accident – Lights on or off analysis

Gilmore Engineers were provided with globes from headlights, brake lights and indicator lamps of a vehicle involved in a car accident in Sydney. Our engineer examined the remains of the globes under a microscope. He then determined which of the globes were likely to have been illuminated at the time of the impact.

Bouncing Rock

A football-shaped rock was struck by a vehicle travelling at 100km/h. It was claimed that the rock rolled and bounced high off the bitumen road, striking another vehicle and injuring one of the occupants. Our engineer used advanced computer simulation to map the potential path of the rock showing that the bouncing motion was indeed possible, and was much like that of a Rugby ball.

Semi-Trailer Rollover Carrying Live Load

A prime mover and semi-trailer combination carrying livestock rolled over while negotiating a curve on an NSW highway. Our engineer investigated the incident, including the design of the road, road surface condition and signage. An expert engineering report was provided for the court explaining the contributing factors to the incident.

Offset Frontal Collision

When two vehicles were involved in a head-on collision, their pre-impact positions were questioned. It was requested that our engineers determine the location of the vehicles before impact. Other investigators had estimated the pre-impact location using theory that applies to full-frontal collisions. However, the evidence showed that the collision was an offset frontal impact. Our expert was able to provide a more accurate pre-impact location using the dynamics of offset frontal impacts.

Road Sign Blocking View

Gilmore Engineers investigated an incident at an intersection on a curved section of road. Our engineer walked along the road, taking measurements and photographs, then also drove the incident path taking video with dash and hat mounted video cameras.  Based on the evidence collected, he was able to show that the large blue rest area ahead sign played a significant part in blocking the view of approaching traffic and contributed to the incident.

Prime Mover and Trailer - Stopping Distance

A semi-trailer failed to stop in time at road works at the bottom of a downhill grade. Gilmore Engineers were asked to determine the required sight and stopping distance for the combination approaching the road works. Our expert engineer inspected the scene and took measurements of the slope and road friction along the path — this information was used to calculate the required stopping distance for different approach speeds.

Potential Steering Failure

A 4WD vehicle left the road and crashed into a house. Gilmore Engineers were engaged in inspecting the vehicle to look for any contributing factors to the incident. It was found that the steering box was disconnected from its’ mounting, with some bolts broken, and others missing altogether. Our engineer then performed more detailed analysis and material testing to establish if the failure proceeded the incident or was a result of damage caused during the accident.