Does seeing it make a difference? The self-reported deterrent impact of random breath testing.

Area of Science:

• Traffic Safety
• Behavioral Science
• Law Enforcement

Background:

• Random Breath Testing (RBT) is a key strategy for deterring and apprehending drink drivers.
• Despite RBT, drink driving remains a significant cause of road fatalities.
• The optimal level of RBT exposure for influencing driver perceptions and behavior is not well understood.

Purpose of the Study:

• To investigate the relationship between exposure to Random Breath Testing (RBT) operations and motorists' perceptions of apprehension certainty.
• To examine the impact of RBT exposure on self-reported drink driving behaviors.
• To determine the necessary frequency and type of RBT exposure for effective deterrence.

Main Methods:

• A survey was administered to 961 licensed motorists in Queensland.
• Participants completed questionnaires either in the community or roadside after being breath tested.
• Survey items assessed different types of RBT exposure (e.g., observation vs. active testing) and self-reported behaviors.

Main Results:

• Motorists reported frequent exposure to RBT operations.
• Exposure levels did not significantly correlate with perceptions of apprehension certainty.
• Approximately 25% of participants self-reported engaging in drink driving behaviors.
• Current observation levels of RBT were deemed sufficient, but active testing frequency needed to double.
• Higher RBT exposure predicted a reduced intention for future drink driving.

Conclusions:

• Mere exposure to enforcement may not guarantee compliance; frequency is critical.
• Increasing the frequency of active Random Breath Testing operations is essential for roadside deterrence.
• Enhanced RBT strategies are needed to reduce drink driving offenses and improve road safety.