It’s good to see some more insight into the safety to drive ‘on cannabis’. I’ve had to face this myself and some of their ideas are crazy (IMO). They have said in some studies that your impaired up to 48 hrs later.
Others, your not at all. Which I personally agree with. Similar to your Rx. Know how your affected before using machines! That includes cars. Things that make it so your ‘out of your mind’ you should take safety first and refrain from usage till sober. Some people experience different levels of this. Some people must take certain medications responsibly too.
See what a Canada study found: