When your vehicle's signal lights are broken or you're riding a bike or motorcycle, hand signals help inform others. Here's how:Left turn: Extend left arm straight outRight turn: Extend left arm and bend upward at the elbowStop/Slow down: Extend left arm and bend downward at the elbowAlways make hand signals clearly and in advance — at least 30 meters before the turn. These gestures improve communication and help avoid accidents, especially in areas without working traffic lights.