>>>I have been told (and this may be hooey, as I freely admit) that if there was a quick roadside test for marijuana intoxication it would be legalized. Think about hundreds of thousands of stoned-out drivers on the road...>>>
Yes, I would like to see a roadside test too. Mostly because if a person is drug tested and there is presence of marijuana they are considered DWI. Even if that intoxication occured last week sometime, it still shows in your system.
Yes...that is exactly part of the challenge with acute testing.
Fortunately, like with alcohol, there would be a level test. Heck a large fraction the population could probably get a positive indication for MJ, just by second hand smoke in the halls and public areas of businesses and residences such as apartment buildings.