|
| Variable | Description | Count (proportion) |
|
| (i) Dependent variables | | | | |
| Injury severity | 0-PDO | 10041 (40%) |
| | 1-Injury and fatality | 14988 (60%) |
|
| (ii) Categorical variables | | | | |
| Crash type | 1-Angle | 10799 (43.1%) |
| | 2-Backing | 208 (0.8%) |
| | 3-Head-on | 144 (0.6%) |
| | 4-Rear-end | 9786 (39.1%) |
| | 5-Sideswipe | 1700 (6.8%) |
| | 6-Non-collision | 2343 (9.3%) |
| | 7-Unknown-base | 49 (0.2%) |
| Vehicle 1 type | 1-Car | 13796 (55.1%) |
| | 2-Truck/bus | 4735 (18.9%) |
| | 3-Motorcycle-base | 463 (1.8%) |
| | 4-Other | 1700 (6.8%) |
| | 5-Pickup/van | 4335 (17.4%) |
| Vehicle 1 driver age | 0-less than 16 years old-base | 5528 (22.1%) |
| | 1-16-25 years old | 5484 (21.9%) |
| | 2-26-65 years old | 12307 (49.2%) |
| | 3-more than 65 years old | 1710 (6.8%) |
| Vehicle 1 action | 1-Backing up | 191 (0.7%) |
| | 2-Changing lanes | 1545 (6.2%) |
| | 3-Going straight | 14049 (56.1%) |
| | 4-Making U-turn | 335 (1.3%) |
| | 5-Passing other vehicles/racing | 107 (0.4%) |
| | 6-Stopping | 211 (0.8%) |
| | 7-Turning left | 3886 (15.5%) |
| | 8-Turning right | 1772 (7.1%) |
| | 9-Other-base | 173 (0.7%) |
| | 10-Unreportd | 2192 (8.7%) |
| | 11-Unknown | 568 (2.3%) |
| Vehicle 1 driver condition | 1-Apparently normal | 17036 (68.0%) |
| | 2-Driving under influence (DUI) | 2165 (8.6%) |
| | 3-Drowsiness, fatigue, fainted etc. | 245 (0.9%) |
| | 4-Illness/physical impairment | 209 (0.8%) |
| | 5-Inattention/distraction | 1072 (4.3%) |
| | 6-Obstructed view | 67 (0.2%) |
| | 7-Other-base | 613 (2.4%) |
| | 8-Unknown | 3622 (14.5%) |
| Vehicle 1 condition | 1-Disregarding traffic signs/signals/road markings | 2133 (8.5%) |
| | 2-Driving too fast | 1402 (5.6%) |
| | 3-Failure to yield right of way | 5081 (20.3%) |
| | 4-Failure to keep in proper lane or running off road | 1880 (7.5%) |
| | 5-Following too closely | 3763 (15.0%) |
| | 6-Hit and run | 1715 (6.9%) |
| | 7-Making an improper turn | 678 (2.7%) |
| | 8-Mechanical defects | 85 (0.3%) |
| | 9-Other improper driving | 4211 (16.8%) |
| | 10-Unknown-base | 4081 (16.3%) |
| Vehicle 2 type | 1-Car | 13073 (52.2%) |
| | 2-Truck/bus | 4483 (17.9%) |
| | 3-Motorcycle-base | 449 (1.8%) |
| | 4-Other | 3333 (13.3%) |
| | 5-Pickup/van | 3691 (14.7%) |
| Vehicle 2 driver age | 0-less than 16 years old-base | 6053 (24.2%) |
| | 1-16-25 years old | 3605(14.4%) |
| | 2-26-65 years old | 14123(56.4%) |
| | 3-more than 65 years old | 1248(5.0%) |
| Vehicle 2 action | 1-Backing up | 7 (0.03%) |
| | 2-Changing lanes | 104 (4.2%) |
| | 3-Going straight | 10898 (43.5%) |
| | 4-Making U-turn | 47 (0.2%) |
| | 5-Passing other vehicles/racing | 27 (0.1%) |
| | 6-Stopping | 8398 (33.6%) |
| | 7-Turning left | 1374 (5.5%) |
| | 8-Turning right | 456 (1.8%) |
| | 9-Other-base | 16 (0.06%) |
| | 10-Unreported | 562 (2.2%) |
| | 11-Unknown | 3140 (12.5%) |
| Vehicle 2 driver condition | 1-Apparently normal | 21238 (84.8%) |
| | 2-Driving under influence (DUI) | 103 (0.4%) |
| | 3-Drowsiness, fatigue, fainting, etc. | 81 (0.3%) |
| | 4-Illness/physical impairment | 9 (0.04%) |
| | 5-Inattention/distraction | 10 (0.04%) |
| | 6-Obstructed view | 5 (0.02%) |
| | 7-Other-base | 17 (0.07%) |
| | 8-Unknown | 3566 (14.2%) |
| Vehicle 2 condition | 1-Disregarding traffic signs/signals/road markings | 79 (0.3%) |
| | 2-Driving too fast | 47 (0.18%) |
| | 3-Failure to yield right of way | 91 (0.36%) |
| | 4-Failure to keep in proper lane or running off road | 41 (0.16%) |
| | 5-Following too closely | 65 (0.26%) |
| | 6-Hit and run | 122 (0.48%) |
| | 7-Making an improper turn | 19 (0.08%) |
| | 8-Mechanical defects | 15 (0.06%) |
| | 9-Other improper driving | 225 (0.89%) |
| | 10-Unknown-base | 24325 (97.18%) |
| First harm | 1-Cross median/centerline | 71 (0.28%) |
| | 2-Fence/wall | 20 (0.08%) |
| | 3-Light/luminary support | 28 (0.11%) |
| | 4-Motor vehicle in transport | 6728 (26.9%) |
| | 5-Pedal cycle/pedestrian | 254 (1.0%) |
| | 6-Running off road left/right | 273 (1.1%) |
| | 7-Slow/stopping vehicle | 1041 (4.2%) |
| | 8-Other fixed/movable objects | 82 (0.33%) |
| | 9-Other non-collision | 60 (0.24%) |
| | 10-No data-base | 16471 (65.8%) |
| Road conditions | 1-Dry | 22211 (88.7%) |
| | 2-Wet | 497 (1.9%) |
| | 3-Ice/snow | 26 (0.1%) |
| | 4-Unknown-base | 2295 (9.3%) |
| Weather conditions | 1-Clear | 21074 (84.2%) |
| | 2-Cloudy | 3295 (13.2%) |
| | 3-Rain | 497 (1.9%) |
| | 4-Blowing sand, soil, dirt, snow | 50 (0.2%) |
| | 5-Other | 7 (0.03%) |
| | 6-Unknown-base | 106 (0.4%) |
| Lighting conditions | 1-Daylight | 14945 (59.7%) |
| | 2-Dark | 7084 (28.3%) |
| | 3-Dawn | 325 (1.3%) |
| | 4-Dusk | 446 (1.8%) |
| | 5-Unknown-base | 2229 (8.9%) |
| Highway Factor | 1-Active work zone | 416 (1.7%) |
| | 2-Inactive work zone | 476(1.9%) |
| | 3-Weather | 449 (1.8%) |
| | 4-Other | 496 (1.9%) |
| | 5-None-base | 23193 (92.7%) |
|
| | | Mean | S.D. | Min. | Max. |
|
| (iii) Continuous variables | | | | |
| Total vehicle | Total vehicles involved | 2.04 | 0.59 | 1 | 10 |
|
| (iv) Indicator variables (Yes=1, No=0) | | | | |
| Pedal cyclist | Pedal cyclist | 0.02 | | 0 | 1 |
| Pedestrian | Pedestrian | 0.04 | | 0 | 1 |
| Motorcyclist | Motor cyclist | 0.02 | | 0 | 1 |
|
