| Variable |
No Injury Frequency (%) |
Non-Incapacitating/Possible Injury Frequency (%) |
Fatal/Incapacitating Frequency (%) |
Total Frequency (%) |
|---|---|---|---|---|
| Highway Roadways | ||||
| Road conditions | ||||
| Dry (reference) | 450 (24) | 240(13) | 74 (4) | 787 (42) |
| Wet | 98 (5) | 37(2) | 7 (0.4) | 147(8) |
| Snow | 202 (11) | 23(1.24) | 4(0.21) | 232(12.46) |
| Slush | 78 (4) | 8(0.4) | 2(0.1) | 91(5) |
| Ice | 506 (27) | 82 (4) | 7 (0.38) | 605 (32) |
| Driver characteristics | ||||
| (age) <35 (reference) | 738 (40) | 208 (11) | 34 (2) | 996 (53.5) |
| (age) >=35 | 595 (32) | 182 (10) | 60 (3) | 864 (46) |
| Driver actions | ||||
| Driver was improperly restrained | ||||
| No (reference) | 738 (40) | 208 (11) | 34 (2) | 996 (55) |
| Yes | 595 (32) | 182 (10) | 60 (3) | 864 (46) |
| Negotiating a curve | ||||
| No (reference) | 738 (40) | 208 (11) | 34 (2) | 996 (54) |
| Yes | 595 (32) | 182 (10) | 60 (3) | 864 (46) |
| Interstate Roadways | ||||
| Type of barrier | ||||
| Concrete | 424 (7) | 147 (3) | 19 (0.3) | 606 (11) |
| Cable | 1451 (25) | 110 (2) | 18 (0.3) | 1594 (28) |
| Road Conditions | ||||
| Dry (reference) | 1164 (20) | 329 (6) | 94 (2) | 1616 (28) |
| Wet | 440 (8) | 98 (2) | 17 (0.3) | 560 (10) |
| Snow | 467 (8) | 52 (0.9) | 4 (0.07) | 526 (9) |
| Slush | 220 (4) | 28(0.5) | 2(0.03) | 256(4) |
| Ice | 2437(42) | 322(6) | 29(0.5) | 2802(49) |
| Driver characteristics | ||||
| Driver age | ||||
| <35 (reference) | 2598(45) | 438 (8) | 57 (1) | 3111(54) |
| >=35 | 2130(37) | 390(7) | 89 (1.55) | 2643(46) |
| Driver gender | ||||
| Female | 1457(25) | 346(6) | 42(0.7) | 1858 (32) |
| Male (reference) | 3268 (57) | 482(8) | 104 (2) | 3873 (67) |
| Driver condition | ||||
| Normal (reference) | 3757(65) | 551(10) | 58(1) | 4378(76) |
| Non normal | 898(16) | 265(5) | 85(2) | 1285(22) |
| First harmful event | ||||
| Front head collision | 2211(38) | 428(7) | 56(1) | 2719(47) |
| Roll over | 39 (1) | 37(1) | 14(0.2) | 91(2) |
| Negotiating a curve | ||||
| Yes | 565(10) | 134(2) | 26(0.5) | 729(13) |
| No | 4163(72) | 692(12) | 120(2) | 2031(87) |
| Driver Action | ||||
| Restrain: Driver was improperly restrained | ||||
| No | 4378(76) | 642(11) | 93(2) | 5167(90) |
| Yes | 350(6) | 187(3) | 53(1) | 593(10) |
| Alcohol citation record | ||||
| No | 2500(43) | 350(6) | 64(1) | 2959(51) |
| Yes | 2228(39) | 479(8) | 82(1) | 2801(49) |
| Driver had improper driving action | ||||
| No | 1315(23) | 201(3) | 45(1) | 1586(28) |
| Yes | 3413(59) | 628(11) | 101(2) | 4174(72) |
| Speed limit was complied | ||||
| Yes | 4335(75) | 732(13) | 114(2) | 5224(91) |
| No | 219(5) | 71(1) | 25(0.4) | 392(9) |