| Driver contributory factor | Severity of accident | Total | ||
| Fatal | Serious | Slight | ||
| Exceeding speed limit | 3 | 3 | 5 | 11 |
| Driving too fast for road environment | 11 | 90 | 267 | 368 |
| Driving too fast for other road users | 12 | 30 | 97 | 139 |
| Failing to keep to nearside of road | 0 | 7 | 27 | 34 |
| Driving too close to kerb | 2 | 66 | 292 | 360 |
| Driving too close to vehicle in front | 4 | 191 | 1602 | 1797 |
| Driving too close to vehicle alongside | 0 | 11 | 88 | 99 |
| Overtaking on offside negligently | 3 | 45 | 198 | 246 |
| Overtaking on nearside negligently | 1 | 7 | 95 | 103 |
| Careless lane changing | 5 | 135 | 833 | 973 |
| Reversing negligently | 7 | 62 | 371 | 440 |
| Turning right negligently | 13 | 110 | 409 | 532 |
| Turning left negligently | 4 | 36 | 200 | 240 |
| 'U-turning' negligently | 2 | 20 | 86 | 108 |
| Stopping negligently | 1 | 9 | 75 | 85 |
| Starting negligently | 14 | 97 | 502 | 613 |
| Disobeying traffic signal | 4 | 80 | 299 | 383 |
| Disobeying stop sign (Halt) | 1 | 12 | 58 | 71 |
| Disobeying give way sign (Slow) | 0 | 16 | 124 | 140 |
| Disobeying double white lines | 1 | 7 | 27 | 35 |
| Disobeying directions of police officer | 0 | 0 | 4 | 4 |
| Disobeying school crossing patrol | 0 | 0 | 0 | 0 |
| Opening door negligently | 0 | 8 | 94 | 102 |
| Overtaking in zebra controlled area | 0 | 1 | 0 | 1 |
| Failing to stop at zebra crossing | 4 | 10 | 20 | 34 |
| Failing to signal movement correctly | 0 | 3 | 7 | 10 |
| Emerging from side road negligently | 5 | 46 | 284 | 335 |
| Emerging from private drive negligently | 0 | 4 | 26 | 30 |
| Driving on wrong side of road | 4 | 25 | 85 | 114 |
| Vision affected by atmospheric conditions | 0 | 0 | 1 | 1 |
| Distracted by action inside vehicle | 0 | 8 | 50 | 58 |
| Distracted by action outside vehicle | 1 | 35 | 146 | 182 |
| Losing control (no apparent reason) | 7 | 86 | 218 | 311 |
| Asleep or drowsy | 4 | 34 | 50 | 88 |
| Consumption of drugs | 0 | 1 | 1 | 2 |
| Consumption of alcohol | 3 | 33 | 70 | 106 |
| Sudden illness | 2 | 5 | 11 | 18 |
| Physical handicap (vision) or mental handicap | 0 | 0 | 1 | 1 |
| Physical handicap (hearing) or mental handicap | 0 | 0 | 0 | 0 |
| Physical handicap (others) or mental handicap | 0 | 0 | 2 | 2 |
| Dazzled by sun | 0 | 1 | 2 | 3 |
| Dazzled by headlight | 0 | 1 | 1 | 2 |
| Dazzled by other lights | 0 | 1 | 2 | 3 |
| Losing control of vehicle | 18 | 237 | 1022 | 1277 |
| Trying to avoid collision or otherwise: swerving | 1 | 151 | 541 | 693 |
| Trying to avoid collision or otherwise: skidding | 0 | 8 | 103 | 111 |
| Trying to avoid collision or otherwise: stopping suddenly | 0 | 36 | 203 | 239 |
| Using telephone while driving | 0 | 1 | 2 | 3 |
| Listening to walkman while cycling | 0 | 0 | 4 | 4 |
| Listening to radio/music while driving | 0 | 0 | 1 | 1 |
| Other driver factor | 21 | 310 | 1477 | 1808 |