Table 1.
Descriptive statistics on the daily number of motor vehicle crashes occurring between 15 May and 15 October of each year from 2000–2011.
| Variable | All crashes | Crashes with driver performance- associated factorsa | ||
|---|---|---|---|---|
| Total number | Daily average ± SD | Total number (%) | Daily average ± SD | |
| Year | ||||
| 2000 | 9,956 | 64.6 ± 12.3 | 3,030 (30.4) | 19.7 ± 7.5 |
| 2001 | 9,662 | 62.7 ± 12.7 | 1,948 (20.2) | 12.6 ± 4.2 |
| 2002 | 9,285 | 60.3 ± 12.4 | 1,462 (15.7) | 9.5 ± 3.1 |
| 2003 | 8,802 | 57.2 ± 12.2 | 2,692 (30.6) | 17.5 ± 5.1 |
| 2004 | 8,552 | 55.5 ± 11.8 | 2,548 (29.8) | 16.5 ± 4.8 |
| 2005 | 9,187 | 59.7 ± 13.1 | 2,088 (22.7) | 13.6 ± 4.1 |
| 2006 | 10,409 | 67.6 ± 14.4 | 3,553 (34.1) | 23.1 ± 6.0 |
| 2007 | 11,201 | 72.7 ± 14.8 | 4,134 (36.9) | 26.8 ± 6.3 |
| 2008 | 10,470 | 68.0 ± 14.6 | 4,126 (39.4) | 26.8 ± 6.4 |
| 2009 | 10,685 | 69.4 ± 14.7 | 4,230 (39.6) | 27.5 ± 6.5 |
| 2010 | 10,388 | 67.5 ± 13.5 | 4,196 (40.4) | 27.2 ± 6.1 |
| 2011 | 9,892 | 64.2 ± 14.1 | 3,958 (40.0) | 25.7 ± 7.0 |
| Month | ||||
| May (15th to 31st) | 13,864 | 68.0 ± 12.4 | 4,422 (31.9) | 20.0 ± 10.1 |
| June | 25,174 | 69.9 ± 13.9 | 8,045 (32.0) | 20.6 ± 10.1 |
| July | 26,092 | 70.1 ± 13.1 | 8,284 (31.7) | 20.6 ± 9.9 |
| August | 20,047 | 53.9 ± 11.8 | 6,716 (33.5) | 16.7 ± 8.7 |
| September | 21,954 | 61.0 ± 12.5 | 6,920 (31.5) | 17.7 ± 9.4 |
| October (1st to 15th) | 11,358 | 63.1 ± 13.7 | 3,578 (31.5) | 18.3 ± 10.2 |
| Day of Week | ||||
| Sunday | 13,664 | 51.8 ± 10.1 | 4,589 (33.6) | 16.0 ± 7.9 |
| Monday | 17,279 | 65.5 ± 12.9 | 5,537 (32.0) | 19.4 ± 9.9 |
| Tuesday | 17,337 | 65.7 ± 13.4 | 5,521 (31.8) | 19.3 ± 10.3 |
| Wednesday | 17,394 | 65.9 ± 13.1 | 5,441 (31.3) | 19.0 ± 9.7 |
| Thursday | 17,954 | 68.0 ± 13.6 | 5,706 (31.8) | 20.0 ± 10.3 |
| Friday | 19,147 | 72.5 ± 15.3 | 5,904 (30.8) | 20.6 ± 10.4 |
| Saturday | 15,714 | 59.5 ± 11.3 | 5,267 (33.5) | 18.4 ± 9.2 |
| Holiday | ||||
| No | 115,042 | 64.7 ± 14.0 | 36,822 (32.0) | 19.1 ± 9.8 |
| Yes | 3,447 | 48.5 ± 12.9 | 1,143 (33.2) | 14.8 ± 8.6 |
| Beginning or end of holidaysb | ||||
| No | 112,468 | 64.5 ± 14.1 | 35,995 (32.0) | 19.0 ± 9.9 |
| Yes | 6,021 | 57.3 ± 15.2 | 1,970 (32.7) | 17.9 ± 8.5 |
| aCrashes that included among the list of concurrent factors at least one of the following: “distraction,” “driver error,” or “disease, fatigue, or sleepiness.” bPrevious day, first day, or last day of a holiday period. | ||||