As I was driving behind one orbit bus a second one was on my right side. I was in the farthest left lane and the guy on my right almost hit my car. I had to slam on my breaks to avoid being hit. This was by tempe marketplace that I was almost hit. He could've waited until he passed the light to get over and not almost hit me as there was no room for him to move over but he almost hit me to move over. HORRIBLE DRIVERS!!!! Almost causing a major accident as it was with tons of traffic around. They suck!!