Just saw this and thought it fits this thread, besides issues with traffic or work laws, the legalization might have an impact on Canadians for the travel to the USA. Anyone that invested or invests in pot related business, works in the industry or simply used it might face a lifetime ban to the USA. Already happened to people from other countries, as federally it's still illegal down South.
Adds to my opinion that the whole legalization thing is too early, too rushed and not thought through enough. No laws in place, still lots of confusion, the pros and cons should have been evaluated better, the fallout will be much bigger than failed roadside tests or tests at work.
https://www.politico.com/story/2018/...-border-783260