Discription of Events: Sped up behind me as I was entering the freeway(they were on the entrance ramp also). I had to move 1 lane to the left as the entrance lane was ending (had my blinker on), and she went from behind me to next to me and I was not able to get over. I slammed on my breaks to let her go by and she just became aggressive. She then swerved into the far left lane and then every lane I got into, she would get in front of me and slam on her breaks. I kept trying to get away but she continued to harass me, no matter how fast or slow I went. She almost caused a multi car pule up on the freeway as she slammed on her breaks from 70 mph. I then exited.