It implies that she was on his side of the road but doesn't say specifically, considering how often people cross the lines on that road in the corners I wouldnt be suprised if they were both a bit over their lines.
Ponder this, if she did the usual "I need a bigger SUV than you" and was driving say a 2500 suburban his blazer would have gotten owned. I don't usually view Japanese cars as being particularly safe but I think it's somewhat obvious her car took the brunt of the assault. If they had both in say, volvo's I think they both could have possibly walked away.....
just food for thought
-Pete
