Practice question What does a green downward arrow over a lane mean? That lane is open for travelThat lane is closed aheadYou must turn left from that laneAll vehicles must stop in that lane Answer: A — That lane is open for travel The correct answer is shown above. Try the full quiz for additional practice. Practice more: Tennessee Road Signs Practice Practice Questions - Tennessee Driver License Knowledge Test Road Signs, Signals, and Pavement Markings Practice Exam →