When should you use your turn signals?

Using your turn signals before changing lanes, merging, or making turns is essential for safe driving. Turn signals communicate your intentions to other drivers and pedestrians, allowing them to anticipate your movements. This is crucial for preventing accidents and ensuring traffic flow.

Utilizing turn signals before making a maneuver provides other road users with sufficient time to react appropriately. For example, if you're changing lanes, signaling helps the driver in the lane you're entering understand your intentions, reducing the risk of collisions. Similarly, signaling when turning informs oncoming traffic and pedestrians of your planned direction, enhancing everyone’s safety on the road.

The other choices involve situations where signaling is either too late or not required. Only signaling at night does not address the consistent need for communication on the road, and signaling after changing lanes does not give others the information they need to maintain safety. Additionally, while driving in heavy traffic might necessitate signaling often, it is not an exclusive or sufficient condition for using turn signals. The responsibility to signal applies in all driving conditions, making the first option the most appropriate and comprehensive answer.