When should you consider signaling your intentions?

Signaling your intentions should be done when it would be of benefit to another road user. This principle underpins effective communication on the road, contributing to overall safety and fluidity in traffic. When a driver signals, they provide valuable information to other road users about their intended actions, which allows everyone to make informed decisions. This is essential in preventing accidents and ensuring that other drivers, cyclists, and pedestrians understand what you are planning to do, whether it's changing lanes, turning at a junction, or entering a roundabout.

The other options do not capture the broader requirement for signaling. For instance, signaling solely when seeing another vehicle doesn't account for situations where there may be no immediate vehicles present but where signaling is still necessary for other road users, such as pedestrians or cyclists. Only signaling in heavy traffic limits the action to stressful situations, neglecting the fact that effective signaling is critical in all driving conditions. Lastly, signaling only when turning into your driveway is too narrow, as signaling should also be performed during various maneuvers throughout your journey, not just in specific circumstances. Thus, option B encompasses the full scope of when signaling is beneficial to enhance road safety for all users.