The 2009 technical report "An Analysis of Speeding-Related Crashes:Definitions and the Effects of Road Environments" by the National Highway Traffic Safety Administration showed that about 55% of all speeding-related crashes when fatal listed "exceeding posted speed limits" among their crash factors, and 45% had "driving too fast for conditions" among their crash factors. However, the authors of the report did not attempt to determine whether the factors were a crash cause, contributor, or an unrelated factor. Furthermore, separate research finds that only 1.6% of crashes are "caused" by drivers that exceed the posted speed limit. Finally, exceeding the posted limit may not be a remarkable factor in the crash analysis as there are roadways where virtually all motorists are in technical violation of the law.