DUI (Driving Under the Influence) and DWI (Driving While Intoxicated/Impaired) are American terms for drunk or drug-impaired driving. In Canada, the Criminal Code uses "impaired driving" to describe operating a vehicle while ability is impaired by alcohol, drugs, or a combination. Canadian law sets the criminal blood alcohol concentration (BAC) limit at 0.08%, though provinces have additional penalties (license suspensions, vehicle impoundment) at 0.05% or lower. Impaired driving causing death or bodily harm carries severe penalties including mandatory minimum sentences. Beyond alcohol, driving while impaired by cannabis or other drugs is equally illegal. Police can conduct roadside sobriety tests, demand breath samples, and now conduct oral fluid drug screening. Impaired driving remains a leading criminal cause of death in Canada, making enforcement and public education ongoing priorities.