They who is using roadside swab tests (spit)? In what state? Is it codified into law? Where's the links to support any of these questions? The article you refer to DOES NOT state Stanford Engineers are currently roadside testing anything. The picture shows a roadside stop, but I interpret that to be a random photo for the article.
"The Stanford device "might function" as a practical "potalyzer" because it can quickly detect not just the presence of THC in a person's saliva, but also measure its concentration."
News 
Market Data 
Discover 
AI
