Thirty years ago, at a fair demonstration, they tried to determine passerby’s who were high. They did a quick reaction test, looked at eyes, and a short intoxic

Thirty years ago, at a fair demonstration, they tried to determine passerby’s who were high. They did a quick reaction test, looked at eyes, and a short intoxication test using a driving video with questions. They could not determine if people were high or tired but both were ineligible to drive according to their tests. Never heard of any improvements or applications.