Practice question What does a red X lane-use signal above your lane mean? Do not drive in that laneUse that lane only to passThat lane is for bicycles onlyThe lane is the fastest route Answer: A — Do not drive in that lane The correct answer is shown above. Try the full quiz for additional practice. Practice more: SD Road Signs Practice Practice Questions - South Dakota Driver License Signs, Signals, and Pavement Markings Practice Exam →