I initially wanted to argue the "Strong need for this device" premise that you layed out, because last I checked the dose-response research re: thc and driving

I initially wanted to argue the "Strong need for this device" premise that you layed out, because last I checked the dose-response research re: thc and driving impairment hadn't really been done. However when I did the research on PubMed, there are some systematic reviews which indicate things like the following [1]: "Nearly two thirds of US trauma center admissions are due to motor vehicle accidents (MVAs), with almost 60% of such patients testing positive for drugs or alcohol." They conclude with: "Consuming cannabis before driving, with or without alcohol, is a common occurrence that produces substantial morbidity and mortality on the roadway. Research is needed to further define cannabis’ effects on driving performance and to provide the scientific basis for laws to improve road safety." [1] - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3836260/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3836260/