Which arm signal indicates slow or stop?

• A. Left Turn
• B. Right Turn
• C. Slow or Stop
• D. U Turn

Answer: (C)

The signal that means slow or stop is the one where your left arm is extended straight downward. This position communicates clearly to drivers behind you that you’re reducing speed or preparing to stop, which is especially important if your vehicle’s electrical signals aren’t working. The downward arm signal is distinct from the other two arm signals—left arm straight out to the side means a left turn, and left arm bent at a right angle with the hand up signals a right turn—so it uniquely conveys slowing or stopping rather than turning. Using this signal helps pedestrians and other drivers anticipate your movements and react safely. If your signals are functioning, use them, but when signaling by hand, the downward position specifically indicates you intend to slow down or stop.