[ams6110]

Lots of people who you would think should know better drive under the influence of alcohol. I think part of the reason is that alcohol impairs judgment. Having never smoked weed, I'm curious about whether there is that same effect. Are you more able to tell yourself "I'm high, I shouldn't drive" than you are "I'm drunk, I shouldn't drive"?

[deelowe]

Absolutely. Pot makes you paranoid man...

[redblacktree]

Anecdotally, yes, people tend to know when they're too stoned to drive.

Here's something addressing a similar question[0]:

> Detrimental effects of cannabis use vary in a dose-related fashion, and are more pronounced with highly automatic driving functions than with more complex tasks that require conscious control, whereas alcohol produces an opposite pattern of impairment. Because of both this and an increased awareness that they are impaired, marijuana smokers tend to compensate effectively while driving by utilizing a variety of behavioral strategies.

[0]: http://www.tandfonline.com/doi/abs/10.1080/10550490902786934