| Driver contributory factor | Severity of accident | Total | ||
| Fatal | Serious | Slight | ||
| Exceeding speed limit | 3 | 3 | 6 | 12 |
| Driving too fast for road environment | 7 | 87 | 246 | 340 |
| Driving too fast for other road users | 6 | 28 | 109 | 143 |
| Failing to keep to nearside of road | 0 | 3 | 17 | 20 |
| Driving too close to kerb | 1 | 50 | 338 | 389 |
| Driving too close to vehicle in front | 1 | 199 | 1716 | 1916 |
| Driving too close to vehicle alongside | 0 | 10 | 101 | 111 |
| Overtaking on offside negligently | 2 | 32 | 187 | 221 |
| Overtaking on nearside negligently | 1 | 10 | 102 | 113 |
| Careless lane changing | 7 | 142 | 994 | 1143 |
| Reversing negligently | 6 | 69 | 346 | 421 |
| Turning right negligently | 10 | 94 | 430 | 534 |
| Turning left negligently | 4 | 43 | 241 | 288 |
| 'U-turning' negligently | 1 | 12 | 94 | 107 |
| Stopping negligently | 0 | 9 | 62 | 71 |
| Starting negligently | 14 | 105 | 595 | 714 |
| Disobeying traffic signal | 9 | 78 | 289 | 376 |
| Disobeying stop sign (Halt) | 0 | 15 | 75 | 90 |
| Disobeying give way sign (Slow) | 1 | 14 | 144 | 159 |
| Disobeying double white lines | 0 | 2 | 11 | 13 |
| Disobeying directions of police officer | 0 | 0 | 2 | 2 |
| Disobeying school crossing patrol | 0 | 0 | 1 | 1 |
| Opening door negligently | 0 | 13 | 98 | 111 |
| Overtaking in zebra controlled area | 0 | 1 | 3 | 4 |
| Failing to stop at zebra crossing | 0 | 5 | 17 | 22 |
| Failing to signal movement correctly | 0 | 1 | 11 | 12 |
| Emerging from side road negligently | 1 | 46 | 251 | 298 |
| Emerging from private drive negligently | 0 | 3 | 31 | 34 |
| Driving on wrong side of road | 2 | 28 | 97 | 127 |
| Vision affected by atmospheric conditions | 1 | 1 | 7 | 9 |
| Distracted by action inside vehicle | 1 | 22 | 86 | 109 |
| Distracted by action outside vehicle | 4 | 35 | 190 | 229 |
| Losing control (no apparent reason) | 8 | 85 | 255 | 348 |
| Asleep or drowsy | 5 | 22 | 66 | 93 |
| Consumption of drugs | 0 | 1 | 1 | 2 |
| Consumption of alcohol | 4 | 27 | 66 | 97 |
| Sudden illness | 2 | 5 | 18 | 25 |
| 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 | 2 | 2 |
| Dazzled by headlight | 0 | 0 | 0 | 0 |
| Dazzled by other lights | 0 | 0 | 1 | 1 |
| Losing control of vehicle | 19 | 250 | 1100 | 1369 |
| Trying to avoid collision or otherwise: swerving | 2 | 142 | 643 | 787 |
| Trying to avoid collision or otherwise: skidding | 2 | 27 | 102 | 131 |
| Trying to avoid collision or otherwise: stopping suddenly | 0 | 48 | 294 | 342 |
| Using telephone while driving | 1 | 0 | 4 | 5 |
| Listening to walkman while cycling | 0 | 0 | 1 | 1 |
| Listening to radio/music while driving | 0 | 0 | 0 | 0 |
| Other driver factor | 27 | 304 | 1606 | 1937 |