- NASS is the NHTSA National Accident Sampling System
PDOF is the Principal Direction of Force.
PDOF is explained in detail in the following NHTSA NASS document:
'What Is' type questions related to highway safety, accident reconstruction and vehicle simulation
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We made a copy of a prior thread:
Prior post updated to remove any mention of REGISTRANT ONLY SECTION...we removed that section, made all topics OPEN and merged all topics to: