How does cannabis use affect a person’s driving ability?
Cannabis use can impair:
- reaction time
- time and distance perception
- short-term memory
- hand-eye coordination
As a result, driving under the influence of cannabis can increase the risk of a crash by up to 300%. Furthermore, driving skills can be negatively affected for up to five or more hours after using cannabis. Using cannabis and alcohol together, even at low doses, also has a larger negative effect on driving than either cannabis or alcohol use alone.
Source: Adapted from the Drug Aware website.