Today had a good scare and it happened so quick, was still shaking hours later I was so mad. Today on my way to work, was riding in the left lane in moderate traffic which is normal for this road ( I always stay in this lane as no bumps and I eventually need to turn left off of it). The traffic speeds up and slows down due to all the traffic cutting in and out, turning etc. Came around a curve which has an intersection a little ways down the road and then it starts curving up a small incline, I saw up ahead an 18 wheeler in the right lane so I already was thinking about the cars behind it pulling out to get away from the 18wheeler, plus I looking at the cars in front me and too my left side as a turning lane was opening up for traffic to turn left. The car on my right was keeping pace with me as we were locked in with the flow of traffic. Everything was normal as usual, then I hear the car behind me beeping its horn and glance to my right mirror but saw the car on my right was moving into my lane very slowly (I was a little forward of her drivers window), the lady was pushing me into the left hand turn lane into the traffic coming up from behind me, I jerked my bike to the left and started hitting the brakes. Basically she was squeezing me into the other lane and traffic, all the time the cars behind us were beeping their horns, the intersection was upon us and on the other side of the intersection was a concrete medium facing me, I was able to slow down enough and she squeezed by and we missed side swiping by inches and I avoided the medium. Needless to say it gave me a good scare. She was then in front of me. I honestly felt that she just used her vehicle to push me out of her way so she could go around the 18 wheeler. Luckily there is another intersection about 200 yrds away and the light had turned red, I pulled up next to her on her drivers side window and she rolled down the window and she said said she didnt see me. Anyway I went off, I let her know ezactly what I thought of her and her driving. The guy behind me who had been been beeping his horn had left an opening for me to back into once I finished voicing my opinion to her. I need too buy that guy a beer as he knew ezactly what was going on. Needless to say got to work and could not concentrate at all.. still had the shakes 3 hours later at work and took a sick day for the rest of my shift. Now after some time to think about it, some things that bothers me is.. I was not able to hit the horn as soon as I saw the problem my first instinct was move away then hit the horn, also was I wrong for yelling at her at the next intersection?? this all happened so quickly just wondering what I could have done better. My wife thought I should have got her tag number and called the police. Whats your thoughts, all opinions welcomed.