Technical Investigations and Consultants (PTY) LTD



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Forensic Engineering

The following can be done in the reconstruction of the scene of vehicle accidents:

* Tyre examination
* Photography for the expert report
* Measurement of relevant features of the scene for an explanatory plan of the scene
* Identification of possibilities, probabilities and contributing factors
* Description of the dynamic behaviour of vehicles in accident situations
* Application of Mathematics and Physics (i.e. speed calculations, momentum principles, energy principles, vehicle dynamics and occupant behaviour during collisions)
* Examination of heavy vehicle accidents and multiple vehicle accidents

Minimum requirements of the expert report:

SCENE

* A complete description of the scene
* Describe possible dangers at the scene (assess road safety-general)

Describe the following in a complete manner

* Road surface type
* Road surface condition (bumps, age, etc.)
* Road texture
* Gradients/slopes
* Width of road
* Width of road shoulder - (Gravel or tar)
* Curves/turns before or after scene
* Physical factors that might influence vehicle dynamics
* Any irregularities
* Point of impact
* Marks made by vehicles on the scene
* Describe how marks were made
* Position of marks on the scene

VEHICLES

* Damage to vehicles
* Position of damage
* Degree of damage
* Type of damage (impact, graze, mechanical failure)
* Deductions about mechanism that caused damage
* Final rest positions of vehicles described

DISCUSSION

* Discuss vehicle movements
* Discuss other possible scenarios
* Discuss probabilities
* Discuss the match between the probabilities and the physical evidence
* (Use a holistic approach and use precise wording)

CONCLUSION

* Give a summary of most probable scenario
* State other possibilities only if reasonably possible
* If there is only one possibility, state it clearly
* Summarize taking road conditions and road circumstances into account









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