Practice question What does a white right-edge line help mark? The right edge of the roadwayThe center of opposing trafficA no-parking zone on both sides of the streetA railroad crossing only Answer: A — The right edge of the roadway The correct answer is shown above. Try the full quiz for additional practice. Practice more: Maryland Road Signs Practice Practice Questions - Maryland MVA Knowledge Test Road Signs, Signals, and Pavement Markings Practice Exam →