Practice question What does a red and white downward-pointing triangle mean? No passing zone beginsYield the right-of-wayRailroad crossing aheadSchool zone ahead Answer: B — Yield the right-of-way The correct answer is shown above. Try the full quiz for additional practice. Practice more: Puerto Rico Road Signs Practice Practice Questions - Puerto Rico DTOP CESCO Road Signs, Traffic Signals, and Pavement Markings Practice Exam →