I might be agreeable to that once tests like the one below are proven reliable and accurate... Although it has nothing to do with police reform and everything to do with amending/changing the current laws on the books. Police don't make the laws they enforce them. Jails don't determine how long the sentence is, Judiciaries do, with the guidance of letter of the law. So again it falls back on the legislators to amend or change the laws concerning minimum/maximum sentences for each crime. Repeat offenders should be held more accountable than a first time offender. As far as jailing people for smoking weed... Kamel Toes Harris put more people behind bars for weed than any other state in the country and threw the book at them. Many of those people are still in prison how long now after it became legal to smoke it in CA? So I don't really see this as a liberal vs conservative problem. I know a whole LOT of conservatives that would be happy to see marijuana become legal in every state... Where their hang up is most conservatives believe the laws should be enforced even if they don't agree with the law!
Just like alcohol, weed is a mind altering substance that can slow reaction time, therefor it poses a considerable danger to the public in general when driving is tossed in the mix.
A CDL driver is allowed 0.00 alcohol in their system while operating commercial equipment and 0.04 in their own personal vehicle, marijuana has to be treated the same.
https://www.aaas.org/news/rapid-marijuana-saliva-test-detects-immediate-use-within-minutes