I dunno... I've seen roomates do some dumb thing while stoned when I was smoking/living with people at my last place over a year ago. Depending on how high she was, it's totally feasible that she could have gotten confused and gotten on the wrong freeway offramp.
Just thing about it...
Look at your different type of freeways... In California we have like 3 different types of on/off ramps.
Some have the loop, others have on-off ramps next to each other on the same side, others have an on ramp on one side and an off ramp on the other. If your not familiar with an area, and or not paying attention is's EASY to get confused around here. I know on like 1/2 of the freeways you make a right to get on the freeway, and the other 1/2 you make a left. And on the ones where you make a left if you turned right, it would be onto the exit ramp from the freeway.
Just an example of one of many of our WTF freeway's.
Add in being stoned and on vicadin, and probably being tired, and it being WAY dark, it's totally easy too see how she could have gotten on the wrong ramp.
