Discription of Events: No use of directional signals. This female cut be left in a left turning light. I had to slam on my breaks so she wouldnt collide into my front end. when I got next to use and put hand up in efforts to bring attention to the situation she swerved into my lane as a threat to leave her alone. She then continued speeding, changing lanes abruptly and still continuing to disregard the use of directional signals.