Table 1: Top Eight Factors Contributing to Fatal Crashes by Crash Size, 2004-2008

Table 1: Top Eight Factors Contributing to Fatal Crashes by Crash Size, 2004-2008

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Factor All fatal crashes Single vehicle Two vehicle Multi-vehicles (three or more)
1 Traffic controls Crash characteristics Traffic controls Road characteristics
2 Speed and route type Traffic controls Road characteristics Speed and route type
3 Road characteristics Speed and route type Speed and route type Road classification
4 Weather impacts Weather impacts Road classification Traffic controls
5 Traffic flow Road characteristics Location of crash Weather impacts
6 Crash characteristics Traffic flow Weather impacts Drunk driving/light condition
7 Road classification Road classification Drunk driving/light condition Persons
8 Persons Persons Persons Location of crash

NOTES: "Crash characteristic" relates to the crash's relation to the roadway and the first harmful event which occurred; "Persons" relates to the relationship between the number of persons involved in a fatal crash and fatality counts; "Drunk driving/light condition" is driven by the relationship between the FARS variables associated with drunk driving and the time of day.

SOURCE: U.S. Department of Transportation, National Highway Traffic Safety Administration, FARS Database, as of December 2009.