Practice question What does a steady red X over a lane mean? You are not allowed to use that laneYou may use the lane only to passYou may turn left from that laneYou must stop in that lane Answer: A — You are not allowed to use that lane The correct answer is shown above. Try the full quiz for additional practice. Practice more: PA Road Signs Practice Practice Questions - Pennsylvania Knowledge Test Signs, Signals, and Pavement Markings Practice Exam →