The Traffic Accident Reconstruction Origin -Approach Angles Problem-

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What Does Context Mean?


To the left appears a diagram of a collision. This collision occurred on an interstate highway. At an acute angle, a vehicle skidded from the travel lanes, across the paved shoulder and collided with a barrier wall. The vehicle bounced off the wall. It continued to skid for some distance and came to rest.

Measurements

Pre-Collision Skid Distance: 50' (15.25m)
Post-Collision Skid Distance: 25' (7.62m)
Drag Factor for all surfaces: .75
Grade: Insignificant

Question 1: With this information (including the diagram) what is a pre-skid minimum speed estimate for the vehicle in diagram A?




To the left appears a diagram of a different collision. This collision evidence consists of only skid marks within an intersection. The measurements are indicated in the diagram.

Measurements

Pre-Collision Skid Distance: 50'(15.25m)
Post-Collision Skid Distance: 25' (7.62m)
Drag Factor for all surfaces: .75
Grade: Insignificant

Question 2: With this information (including the diagram) what is a pre-skid minimum speed estimate for the vehicle in diagram B?




Question #3: The measurements for the two skids are identical. Are the two calculated minimum speeds different? If so why?


There is no further information.

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