Crash Data Services, LLC
| Providing quality traffic accident investigation and reconstruction |
Between July 2005 and December 2007, the
National Highway Traffic Safety
Administration (NHTSA) investigated 5,471
injury crashes that took place across the
country. The investigation allowed a first-hand
comparison of physical evidence and
interviews of witnesses involved in the
accident. NHTSA experts evaluated the data
to determine the factors most responsible for
the collisions.
Factors fell into categories, such as errors
attributable to the driver, the condition of the
vehicle, failure of vehicle systems, adverse
environmental conditions, or roadway design.
Overall, vehicles traveling too fast for
conditions accounted for only 5% of the
critical (most significant) pre-crash events.
More often observed critical factors included
22% driving off the edge of the road and 11%
who improperly drove across the center line.
This does not mean that speed is not an
important factor in accident reconstruction.
Speed violations are associated with 39% of
fatal crashes and are the critical causal factor
for 14% of deadly accidents.
And while speed may not be the most
prevalent causal factor for an accident, many
medical experts believe that rear-end
collisions as low as 5 MPH can induce
cervical (neck) injury.
National Highway Traffic Safety
Administration (NHTSA) investigated 5,471
injury crashes that took place across the
country. The investigation allowed a first-hand
comparison of physical evidence and
interviews of witnesses involved in the
accident. NHTSA experts evaluated the data
to determine the factors most responsible for
the collisions.
Factors fell into categories, such as errors
attributable to the driver, the condition of the
vehicle, failure of vehicle systems, adverse
environmental conditions, or roadway design.
Overall, vehicles traveling too fast for
conditions accounted for only 5% of the
critical (most significant) pre-crash events.
More often observed critical factors included
22% driving off the edge of the road and 11%
who improperly drove across the center line.
This does not mean that speed is not an
important factor in accident reconstruction.
Speed violations are associated with 39% of
fatal crashes and are the critical causal factor
for 14% of deadly accidents.
And while speed may not be the most
prevalent causal factor for an accident, many
medical experts believe that rear-end
collisions as low as 5 MPH can induce
cervical (neck) injury.
| The total speed displaced by a vehicle (S) as it skids to a stop is equal to the square root of 30 (a constant) times the vehicle's drag factor (f) times the skid distance (d). |
| The Illinois State Police started using radar in 1956 for speed enforcement. - ISP |
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| To read NHTSA's 2008 National Motor Vehicle Crash Causation Survey, please click here. |
| High and Low Speed Traffic Accident Reconstruction Expert |
| The energy required to cause permanent deformation of a vehicle can be used to calculate the speed that a vehicle was traveling at impact. Accident reconstruction experts can utilize crash tests performed by manufacturers, NHTSA, or the IIHS to determine what the stiffness coefficient of the vehicle is. These stiffness coefficients allow the crash reconstructionist to determine the equivalent speed needed to cause damage if the crush profile or damage dimensions are measured accordingly. The illustration below shows 5 crush measurements (C1 to C5). |
| Our experts are always available to fulfill your accident reconstruction needs. |
| 1-847-217-6644 |
| Reach our reconstruction experts by email: |
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