Question A diamond-shaped sign means: Answers Yield. Stop. Warning. Explanation Diamond-shaped signs are used to warn drivers of special conditions or hazards ahead. They are typically yellow or orange in color. This questions appears in the following tests: Wisconsin Motorcycle Practice Test 32 California Motorcycle Practice Test 36 Georgia Motorcycle Practice Test 17 Kansas Motorcycle Practice Test 70 Tennessee Motorcycle Practice Test 28 Virginia Motorcycle Practice Test 1 Wyoming Motorcycle Practice Test 30