CHICAGO --It was slow going Monday night on a section of the Dan Ryan. expressway.A semi flipped on its side on the feeder ramp for I-55 and Cermak about 5 p.m. Crews began work to upright the semi quickly. The truck also spilled its load on the ramp. The accident continued to block three lanes of traffic on the inbound side of the Ryan. Traffic was getting by on the far right lane. There is no word on any injuries.