Crude crash, conviction, and “at fault” crash rates per 100 driver-years at risk: pre-treatment
| Group | Crashes* per 100 driver-years | Convictions per 100 driver-years | “At fault” crashes per 100 driver-years |
|---|---|---|---|
| *Crashes in which someone has been killed or injured or where there is property damage above $700 (raised to $1000 in January, 1998) must be reported to the police. The Police Accident Report is forwarded to the Ministry of Transportation for their records. | |||
| Control | 5.37 | 21.89 | 2.49 |
| Alcohol only | 4.89 | 16.78 | 1.98 |
| Cannabis only | 6.30 | 22.86 | 3.21 |
| Cocaine only | 7.70 | 40.93 | 3.44 |
| Alcohol and cannabis | 7.20 | 20.30 | 4.32 |
| Alcohol and cocaine | 6.51 | 25.54 | 4.30 |
| Cannabis and cocaine | 6.69 | 35.98 | 3.27 |
| All three | 6.24 | 24.30 | 3.57 |