How can cyclists effectively use turn signals for bikes to communicate their intentions to other road users?

Cyclists can effectively use hand signals to communicate their intentions to other road users. To signal a left turn, extend the left arm straight out to the side. To signal a right turn, extend the right arm straight out to the side or bend the left arm up at a 90-degree angle. To signal a stop, extend the left arm down at a 90-degree angle. These signals help other road users anticipate the cyclist's movements and promote safer interactions on the road.