When you approach an octagonal sign, you must: Question When you approach an octagonal sign, you must: Answers Slow. Stop. Turn. Explanation An octagonal (eight-sided) sign always means "Stop." Come to a complete stop, yield to traffic and pedestrians that have the right-of-way, and proceed when the way is clear. This questions appears in the following tests: Wisconsin Motorcycle Practice Test 11 Wisconsin Motorcycle Practice Test 12