Practice question A green arrow lane-use signal over a lane means: You may drive in that laneThe lane is closedMove out of the lane because it will closeUse the lane only for left turns Answer: A — You may drive in that lane The correct answer is shown above. Try the full quiz for additional practice. Practice more: Iowa Road Signs Practice Practice Questions - Iowa Driver's License Knowledge Test Road Signs, Signals, and Pavement Markings Practice Exam →