Discription of Events: I was traveling on 287 East bound going toward 80 by the west caldwell exit ramp. I was traveling on the right side and a truck was on the left but more far up from me. Just incase... Then this Nissan Rogue car cut off the truck on the left side to suddenly change her travel over the white lines. The 18 wheeler truck might have not seen me or seen he might have had enough room so he got over infront of me. I knew I did not have enought time to brake so I checked all mirrors for traffic. I leaned over the line to stop enough to not hit the truck. She could have caused a really bad accident. When I passed her up on 80 she looked distracted with kids in the vehicle. Super dangerous driver!! GS on the plate.