What is the correct hand signal for stopping or slowing down?

The correct hand signal for stopping or slowing down is indicated by placing the left arm bent downward at a 90-degree angle. This signal is universally recognized among drivers and motorcyclists as a clear indication that the person intends to reduce speed or come to a complete stop. This position makes it more visible to drivers behind the individual, effectively communicating the intention to slow down or stop, which is crucial for ensuring safety on the road.

While other signals might indicate different maneuvers, the downward bent arm is specifically linked to the action of slowing or stopping. For example, an extended left arm horizontally signifies a left turn, while a right arm extended horizontally indicates a right turn, which is moot in the context of signaling for a stop. Thus, understanding and utilizing the correct hand signals enhances road safety and communication among all road users.