Speed awareness courses are a fund raiser for the police forces.
Would this work for drugs courses?
The drug awareness courses are to let people know amongst other things that you can be caught and done for drug driving long after you think its safe and you would pass the swipe test -
as it says below the legal limit is 2 micrograms of THC an average-sized joint should contain around 120 micrograms of THC its not a wonder so many people fail the swipe.
Weed Legal Limit
However, to rule out accidental exposure to an illegal drug like cannabis, there are legal limits set for each type of drug. For cannabis, this legal limit is set at just 2 micrograms of THC per litre of blood. If you’re over this limit, even by a small amount, you’ll face prosecution.
One exception to this rule is the use of
medical cannabis, which became legal in 2018. Smoking cannabis for medical reasons could help you avoid drug driving penalties, although you’ll need to prove that it was lawfully obtained, had been supplied for medical or dental purposes and that it was taken in accordance with the directions issued at the time.
How Long Should I Wait?
Unfortunately, there’s no hard and fast rule for how long you should wait before driving after recreational cannabis use. This is because cannabis is not regulated, so you can’t know for sure how much THC you’re consuming.
Generally, an average-sized joint should contain around 120 micrograms of THC, although weed has been becoming more potent over the last few years. The half-life of the THC metabolites will determine how long you need to wait – this is the amount of time it takes for the THC in your bloodstream to reduce by half.
Again, this isn’t a foolproof calculation as the half-life will be affected by the amount of THC you take and also your physical characteristics, such as your height and weight. Waiting at least 12 hours should be enough if you’ve consumed around 120 micrograms of THC, but it’s best to wait at least 24 hours if you want to be safe.
https://drugdrivingsolicitors.co.uk/how-long-after-smoking-weed-can-i-drive/