DUI tests,

Puff test for pot use will be reality within a year, WSU researchers say

Melissa Santos ~ NewsTribune.com~

Researchers at Washington State University say they think they are about a year away from having a portable breath test that police can use to detect if someone has recently consumed marijuana.
Why this pressing issue should be among cannabis consumers’ most urgent concerns – Cannabis News

Do you get high? Do you drive? This is why you need to understand the laws behind DUI marijuana charges — and the particular science of THC, too.