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" The National Highway Traffic Safety Administration defines aggressive driving as " the operation of a motor vehicle in a manner which endangers or is likely to endanger persons or property . In keeping with the Congressional mandate that the National Highway Traffic Safety Administration provide public access to government information , the NHTSA Technical Reference Division ( TRD ) was established as the reference facility for the Administration 's public records . Highway Traffic Safety Administration 's ( NHTSA ) public affairs news and information archive for 1999 . This research was funded by the National Highway Traffic Safety Administration .