I was riding up the interstate this morning running about 75 - 80. I was in the left hand lane and all of a sudden a lady in her car cuts over from the center lane. No turn signal or anything. She missed my front tire by about a foot and a half at the most. As soon as she got in front of me she slowed down. I layed down on the horn. She goes to looking around like a deer in the headlights. When she notices me she slows down even more and turns her turn signal on and slowly goes back over into the middle lane. Everyone be careful out there and watch out for the others because they are not watching for us. Ride safe!