Practice question What does RA 10666 address? Registration of top boxesBus standing rulesTruck speed limiter markingsSafety of children aboard motorcycles Answer: D — Safety of children aboard motorcycles The correct answer is shown above. Try the full quiz for additional practice. Practice more: LTO Motorcycle A A1 Practice Questions - Philippines LTO DL Code A A1 Motorcycle and Tricycle Theoretical Examination Exam →