Drink Driving Checkpoints Are an Effective Method of Enforcement
Drink driving checkpoints are an effective method of enforcement and involve many police and police vehicles. The checkpoints should be highly visible through the use of police vehicles, signs and warning lights so that it is obvious that drink driving laws are being enforced. This sends a clear message to people who pass by that police are actively enforcing drink driving.
Source: GRSP Drinking and Driving Fact Sheet
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