Practice question A red X lane-control signal above a lane means: Do not drive in that laneThe lane is open to all trafficUse that lane only to passStop in that lane and wait Answer: A — Do not drive in that lane The correct answer is shown above. Try the full quiz for additional practice. Practice more: Idaho Road Signs Practice Practice Questions - Idaho Driver License Knowledge Test Road Signs, Signals, and Pavement Markings Practice Exam →