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Event Data Recorders
Skid Speed Calculator
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Skid Speed Calculator

This calculator is provided without warranty and is not applicable to any specific situation. See our Terms of Use. Do not use the results of this calculator in any legal proceedings or insurance claims actions. It is not a substitute for a speed analysis by a qualified traffic accident reconstructionist.

All new 2014 and later model year cars, light trucks, vans and SUVs sold in the United States are equipped with an Event Data Recorder. 

Many 2000 and later model year vehicles also have an EDR.

These devices can record vehicle speed, brake application, steering input and much more in the seconds preceding a crash. 

Harris Technical Services can recover the information in these data recorders.

For EDR information on a specific year, make and model of vehicle, please contact us.

Select surface type:                      

Select condition:                                    

Enter the grade in percent:                     %
Use 0% for level.
Use negative ( - ) for a downhill grade. 
Example: 2.5% downhill = -2.5%
Enter the length of the skid:                    feet

The result will appear in a new window. This form will reset
after each calculation.