Answer:

Impairment from cannabis use while driving is measured using various tests that evaluate cognitive, behavioral, and physiological factors. Law enforcement professionals look for signs of impaired judgment and motor skills, and researchers often use breathalyzers, blood tests, and on-road evaluations.

Is Driving on Medical Marijuana Legal in the US?

Key Factors in Measuring Cannabis Impairment:

• Cognitive Function: Assessments of attention, memory, and reaction times are key.
• Behavioral Indicators: Police officers observe for erratic driving patterns, impaired motor coordination, and delayed response times.
• Physiological Tests: Devices like breathalyzers can detect recent cannabis use, but not the level of impairment.

Tools and Techniques Used:

• Breathalyzer Tests: Used for quick assessment of recent cannabis use, not necessarily impairment level.
• Blood Tests: Provide a more accurate measurement of recent cannabis exposure.
• On-Road Evaluation: Officers may test driving skills in controlled conditions.