In which situation is it important to flash your brake light?

Flashing your brake light is particularly important when someone is tailgating you because it serves as a visual cue to alert the following driver that you may be slowing down or stopping. This can help prevent a rear-end collision, which is a common hazard when someone is driving too close behind you. By signaling with your brake light, you increase the likelihood that the tailgater will take appropriate action, such as increasing their following distance or slowing down in response to your potential stop.

In contrast, during situations like starting your motorcycle, approaching a stop sign, or turning on a winding road, your brake light might not be as critical for communication with other drivers. When starting, there are often other indicators of your intent, and at a stop sign, you would typically come to a complete stop—making the use of the brake light less necessary. When turning on a winding road, your intention may be clearer based on your positioning and movement, and using your brake light might not be needed as frequently.