This morning on the way to work I had a woman try and lane split in her car. I was in the right hand lane and in the left wheel track approaching a light that had just turned green. There were about 7 cars between me and the intersection. She came up on my right and I originally though she was going to the right-turn lane for the intersection. -no worries, I thought. But she continued to share my lane for what seemed like ages (300m?) I couldn't speed up as there was traffic still in front of me, I didn't feel safe slowing down and letting her pass as I wasn't sure what she might have done (like moving back into the cntre of the lane b4 she completely passed me etc). The whole time I was on the horn and trying to get her attention. She wouldn't look at me but I am sure she "knew what she was doing". Eventually I got to gap in the left lane and moved into it just b4 another red light. So I pulled up next to her and tapped on the window and signalled for her to wind it down. Only then did she acknowledge that she could see me and proceeded to yell and scream. (with the window still up so I couldn't hear her) My biggest problem is I have no idea why?? was it that she thought I was signalling her thru cos I was in the left of my lane? DId she feel that I really wanted to be in the left lane anyway so she was helping me to move accross? Was her son killed my a motorcyclist last week and she thinks we're all scum? Did she just shit her pants, and is in a hurry to get home to change herself? Is she just a fruit loop who shouldn't be aloud to drive? Cos she would wind the window down, alas, I'll never know.