INVOLVED IN A HEAD-ON COLLISION WHERE A SUBURBAN C1500, GOING EAST ON HUEBNER, TRIED TO TURN LEFT IN FRONT OF MY CAR AND MY C250 T-BONED THE SUBURBAN. BOTH CARS WERE MOVING, MY C250 WAS HEADING WEST ON HUEBNER, AND THE C1500 WAS TURNING LEFT ONTO NW MILITARY IN FRONT OF MY CAR. AT IMPACT, IT WAS MY ESTIMATE MY CAR WAS GOING ABOUT 15-20MPH, I WAS BREAKING FROM 35-40MPH [SPEED LIMIT 45MPH]) WHICH WAS THE POINT I SAW THAT HE WAS TURNING ACCROSS MY FRONT.