| Driver contributory factor | Severity of accident | Total | ||
| Fatal | Serious | Slight | ||
| Exceeding speed limit | 4 | 2 | 7 | 13 |
| Driving too fast for road environment | 7 | 62 | 190 | 259 |
| Driving too fast for other road users | 10 | 62 | 127 | 199 |
| Failing to keep to nearside of road | 0 | 5 | 13 | 18 |
| Driving too close to kerb | 3 | 42 | 228 | 273 |
| Driving too close to vehicle in front | 5 | 231 | 1896 | 2132 |
| Driving too close to vehicle alongside | 0 | 9 | 97 | 106 |
| Overtaking on offside negligently | 3 | 48 | 188 | 239 |
| Overtaking on nearside negligently | 1 | 15 | 79 | 95 |
| Careless lane changing | 2 | 198 | 1056 | 1256 |
| Reversing negligently | 10 | 68 | 371 | 449 |
| Turning right negligently | 15 | 113 | 450 | 578 |
| Turning left negligently | 2 | 39 | 230 | 271 |
| ‘U-turning’ negligently | 0 | 14 | 87 | 101 |
| Stopping negligently | 0 | 9 | 43 | 52 |
| Starting negligently | 4 | 89 | 433 | 526 |
| Disobeying traffic signal | 5 | 93 | 270 | 368 |
| Disobeying stop sign (Halt) | 0 | 9 | 54 | 63 |
| Disobeying give way sign (Slow) | 1 | 18 | 145 | 164 |
| Disobeying double white lines | 0 | 6 | 12 | 18 |
| Disobeying directions of police officer | 0 | 1 | 3 | 4 |
| Disobeying school crossing patrol | 0 | 0 | 0 | 0 |
| Opening door negligently | 0 | 4 | 76 | 80 |
| Overtaking in zebra controlled area | 0 | 1 | 2 | 3 |
| Failing to stop at zebra crossing | 1 | 9 | 17 | 27 |
| Failing to signal movement correctly | 0 | 1 | 5 | 6 |
| Emerging from side road negligently | 4 | 60 | 281 | 345 |
| Emerging from private drive negligently | 0 | 4 | 31 | 35 |
| Driving on wrong side of road | 5 | 33 | 98 | 136 |
| Vision affected by atmospheric conditions | 0 | 2 | 13 | 15 |
| Distracted by action inside vehicle | 0 | 12 | 44 | 56 |
| Distracted by action outside vehicle | 1 | 31 | 105 | 137 |
| Losing control (no apparent reason) | 7 | 58 | 226 | 291 |
| Asleep or drowsy | 2 | 22 | 63 | 87 |
| Consumption of drugs | 1 | 1 | 1 | 3 |
| Consumption of alcohol | 1 | 22 | 58 | 81 |
| Sudden illness | 0 | 6 | 14 | 20 |
| Physical handicap (vision) or mental handicap | 0 | 0 | 0 | 0 |
| Physical handicap (hearing) or mental handicap | 0 | 0 | 0 | 0 |
| Physical handicap (others) or mental handicap | 0 | 1 | 0 | 1 |
| Dazzled by sun | 0 | 0 | 4 | 4 |
| Dazzled by headlight | 0 | 0 | 1 | 1 |
| Dazzled by other lights | 0 | 1 | 0 | 1 |
| Losing control of vehicle | 22 | 306 | 923 | 1251 |
| Trying to avoid collision or otherwise: swerving | 2 | 231 | 785 | 1018 |
| Trying to avoid collision or otherwise: skidding | 0 | 30 | 108 | 138 |
| Trying to avoid collision or otherwise: stopping suddenly | 0 | 41 | 192 | 233 |
| Using telephone while driving | 0 | 0 | 3 | 3 |
| Listening to walkman while cycling | 0 | 0 | 0 | 0 |
| Listening to radio/music while driving | 0 | 0 | 0 | 0 |
| Other driver factor | 19 | 439 | 1662 | 2120 |