A few years ago I had to drive a dually pickup with an 8x18 cargo trailer through the bay area on my way to job. TWICE in about 30 min. lane splitting motorcycles hit my vehicle. One guy tagged his pannier on the dual wheel cover, and another guy tagged his elbow on my towing mirror. It spooked me a bit that they were going so much faster then the flow of traffic, I was a bit worried I would run over one or cut one off while making a lane change.