Simple logo that looks good in both color and B&W.
No more than two colors (black + one color, if possible).
It is perfectly OK if the logo is just B&W, if that is a better look.
The color palette is attached – if a color is used, we’d prefer it to be one of these.
Needs to look serious; some folks surveyed found the attached ideas a bit “cartoonish”
Cannot look amateurish or “home-made”
Someone surveyed told us that just a single car may imply that "high" driver is only a threat to self, not others. We do want to imply that there is a danger to others, but really need to keep the message simple so that someone who only sees it for a second or two will immediately understand the message.
A few people surveyed said not to use a pot leaf, but we need this to immediately inform the reader/viewer that this campaign is about marijuana. We are at a loss on how to do this without a pot leaf, since there are few other symbols that are so widely recognized on this topic.