Crude crash, conviction and “at fault” crash rates per 100 driver-years: post-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 | 5.29 | 13.57 | 2.00 |
| Alcohol only | 2.88 | 8.59 | 1.37 |
| Cannabis only | 5.60 | 19.89 | 2.10 |
| Cocaine only | 4.08 | 23.99 | 1.60 |
| Alcohol and cannabis | 3.33 | 10.28 | 1.43 |
| Alcohol and cocaine | 3.40 | 10.98 | 1.78 |
| Cannabis and cocaine | 3.72 | 20.84 | 2.17 |
| All three | 1.90 | 12.63 | 0.81 |