| Binary Response | Frequency | Percent |
|
| Response | |||
| Rear-end crashes | 2348 | 41.8 |
|
| Non-rear-end crashes | 3270 | 58.2 |
|
| Roadway Characteristics | |||
| Type: four legs or more (1 if yes or 0 otherwise) | 4907 | 87.3 |
|
| Location: urban (1 if yes or 0 otherwise) | 5529 | 98.4 |
|
| Environmental Characteristics | |||
| Non-daylight (1 if yes or 0 otherwise) | 1154 | 20.5 |
|
| Non-dry road surface (1 if yes or 0 otherwise) | 1589 | 28.3 |
|
| Adverse weather (1 if yes or 0 otherwise) | 915 | 16.3 |
|
| Crash Characteristics | |||
| Commercial motor vehicle (CMV) involvement (1 if yes or 0 otherwise) | 326 | 5.8 |
|
| Blowing snow (1 if yes or 0 otherwise) | 74 | 1.3 |
|
| Work zone related (1 if yes or 0 otherwise) | 45 | 0.8 |
|
| Weekend crash (1 if yes or 0 otherwise) | 2015 | 35.9 |
|
| Driver’s Characteristics | |||
| Speeding (1 if yes or 0 otherwise) | 745 | 13.3 |
|
| Driving under the influence (DUI) (1 if yes or 0 otherwise) | 249 | 4.4 |
|
| Continuous Variables | |||
| Mean | Minimum | Maximum | |
| Roadway Characteristics | |||
| Pavement friction number | 39 | 19 | 63 |
| The speed limit of the major route (mi/h) | 34.5 | 20 | 55 |
| Driver’s Characteristics | |||
| Driver 1’s age | 38.9 | 9.0 | 102 |
| Driver 2’s age | 40.4 | 9.0 | 102 |