The bill contains elements that would help a bit in the fight against drug-impaired driving. With this bill, we are trying to make the testimony of evaluating officers more effective. If an evaluating officer determines that a person's ability to drive is impaired by a drug after analyzing a sample of bodily substances, it is presumed that the drug that caused an issue during the evaluation was also causing a problem on the road. It has nothing to do with the legalization of marijuana. It's already a crime to have your driving ability impaired by a drug, be that drug legal or illegal. So there is no change in that respect.
Regardless of what will happen with this bill, I think that marijuana-impaired driving will continue to be a crime.