| Behavior |
Number |
Percent |
| Driving too fast for conditions or in excess of posted speed limit |
9,654 |
21.3% |
| Failure to keep in proper lane or running off road |
7,696 |
17.0 |
| Under the influence of alcohol, drugs or medication |
6,957 |
15.4 |
| Inattentive (talking, eating, etc.) |
4,196 |
9.3 |
| Failure to yield right of way |
3,067 |
6.8 |
| Overcorrecting/oversteering |
2,062 |
4.6 |
| Failure to obey traffic signs, signals or officer |
1,922 |
4.2 |
Swerving or avoiding due to wind, slippery surface, other
vehicle, object, nonmotorist on roadway, etc. |
1,801 |
4.0 |
| Driving wrong way in one-way traffic or on wrong side of road |
1,382 |
3.1 |
| Operating vehicle in erratic, reckless, careless or negligent manner |
1,347 |
3.0 |
| Vision obscured (rain, snow, glare, lights, buildings, trees, etc.) |
1,205 |
2.7 |
| Drowsy, asleep, fatigued, ill, or blacked out |
1,202 |
2.7 |
| Making improper turn |
1,168 |
2.6 |
| Other factors |
7,602 |
16.8 |
| None reported |
15,795 |
34.9 |
| Unknown |
1,009 |
2.2 |
| Total drivers (1) |
45,230 |
100.0% |
(1) The sum of the numbers and percentages is greater than total drivers as more than one factor may be present for the same driver.
Source: U.S. Department of Transportation, National Highway Traffic Safety Administration. |