Discription of Events: I was traveling North on 405 at 8pm in the toll lane at 65 mph. The driver of the Cadillac Escalade speed up onto my bumper of my honda accord so that I could not see the headlights. I speed up to 70mph. That did not improve the situation. I reduced my speed to 60 mph. The driver turned on their highbeams but, still on my bumper. I slowed to 50mph before they moved to the far right lane to exit the freeway. I was able to get a picture of the White Escalade and its license plate.