Practice question What does a steady red X over a lane mean? The lane is open to all trafficThe lane may only be used for left turnsDo not drive in this laneThe lane is about to change to green Answer: C — Do not drive in this lane The correct answer is shown above. Try the full quiz for additional practice. Practice more: Maine Road Signs Practice Practice Questions - Maine Driver License Knowledge Test Signs, Signals and Road Markings Practice Exam →