iPhone Crash Detection and Collision Reconstruction

iPhone Car Dashboard

Apple’s iPhone 14 has a new feature called crash detection. This feature is designed to detect when a user has been involved in a car accident and assist in alerting…

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Videogrammetry: Extracting Temporal Spatial Data for 3D Reconstruction

Analysis

To establish the position of vehicles in space and time, two-dimensional features captured in surveillance video are reprojected to their three-dimensional locations using high density laser scan data. While surveillance…

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How Bicycle-Friendly is Your Neighborhood?

children riding bikes

May is National Bicycle Safety Month, which is an appropriate time of the year to remind riders of best practices as they bring their bicycles out of winter storage to…

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Engineering Animation: Accident of 18-Wheeler and Red Sedan

Accident Collision

Our Engineering Animations team at DJS Associates, Inc., followed methodical steps to accurately reconstruct the events that lead to an accident between an 18-wheeler and the red sedan depicted in…

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Sunny Delight?  Grades Do Matter When Driving

Sun Glare

Previously, I was picking up a morning coffee, when I “ran into” a bit of a sun glare situation. More recently, I was doing a little pre-work, holiday shopping and…

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Sun Glare and the Circle Game … 180 Degrees Makes All the Difference!

Sunglare

Speed from video, tractor-trailer off-tracking, and sun glare are topics I enjoy writing about the most.  Sun glare is the topic of choice this time around. Recently, I picked up…

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Always, Always, Always… Start with the Physical Evidence

Skid Marks

As collision reconstruction engineers, we are charged with the task of applying the laws of physics to the physical evidence that remains following a collision to determine, if possible, how…

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Bus v. Motorcycle Collision: Synchronized Video Demonstrative

View from Bus Driver

When a surveillance camera captured an incident involving a school bus and motorcycle, the forensic science of videogrammetry and three-dimensional accident reconstruction helped determine the speeds of the vehicles and…

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Speed from Video

dashcam

With the growing prevalence of dashcam and surveillance cameras, the cases we get with video of the collision have increased dramatically. In just about all of these cases, we are…

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