This is the best tl;dr I could make, original reduced by 75%. (I’m a bot)
Dr Arkell said: “With cannabis laws changing globally, jurisdictions are grappling with the issue of cannabis-impaired driving. These results provide much needed insights into the magnitude and duration of impairment caused by different types of cannabis and can help to guide road-safety policy not just in Australia but around the world”.
Studying the effects of cannabis on driving with such precision in a real-world context is incredibly important.