Practice question A U.S. Route marker is typically shown as: Black numbers on a white U.S. shieldWhite letters on a brown rectangleA red X over a laneWhite triangles across the lane Answer: A — Black numbers on a white U.S. shield The correct answer is shown above. Try the full quiz for additional practice. Practice more: DC Road Signs Practice Practice Questions - District of Columbia DMV Knowledge Test Signs, Signals, and Markings Practice Exam →