Q: What is CRASH?
A: The acronym CRASH stands for the Computer Reconstruction of Automobile Speeds on the Highway.
The CRASH computer program is an crash reconstruction program. With CRASH you input the vehicle properties, the impact and rest positions, and the vehicle damage measurements. The program produces approximations of the vehicle speeds at impact the impact speed change or Delta-V (DV).
The CRASH computer program was initially created to assist SMAC users in determining first estimates of the impact speeds.
The original CRASH program utilized both piecewise-linear trajectory solution procedures and a damage analysis procedure to provide an initial estimate. The CRASH program was subsequently adopted by NHTSA as an integral part of the National Accident Sampling Study (NASS) investigations. The rationale for the use of the CRASH program was that for statistical studies, the average error in severity determinations is more important than any individual errors. The CRASH program, with it's question and answer mode, vehicle categorization, single step solutions procedure, and most importantly low cost, redirected the NHTSA interest from SMAC towards the CRASH computer program.
For additional information, please see:
'What Is' type questions related to highway safety, accident reconstruction and vehicle simulation
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