Practice question What does a Roundabout Ahead sign mean? There is a roundabout intersection aheadAll vehicles must make a U-turnThe road is closed to bicyclesThe lane becomes a transit-only lane Answer: A — There is a roundabout intersection ahead The correct answer is shown above. Try the full quiz for additional practice. Practice more: Oregon Road Signs Practice Practice Questions - Oregon Driver License Knowledge Test - Road Signs, Signals, and Markings Practice Exam →