Hi. I live in California, and no you cant really smoke pot on the street.But It really is relaxed here. Mostly cops dont care if you smoke pot. California has a BIG problem with meth, so they mostly concentrate on that. If you have a prescription for pot, they will pull you over in your car and let you and your pot go. If they raid your house and you have a prescription they leave your house empty-handed. However if you DONT have a prescription, and you get an asshole cop who does't smoke you can be in big trouble.
However it seems California cops are relieved they dont have to waste manpower on potheads anymore!
Hope this helped!