What should always accompany a turn signal to communicate the maneuver effectively?

To communicate a maneuver effectively while driving, especially in an emergency response context, it is crucial to check mirrors and blind spots in conjunction with using turn signals. This action ensures that the driver is aware of their surroundings and can confirm that it is safe to execute the turn. By checking mirrors, the driver can see vehicles behind and beside them that may not be immediately visible, and checking blind spots helps to identify any hazards that may not be reflected in mirrors, such as other vehicles, pedestrians, or cyclists.

This practice enhances the safety of the maneuver by minimizing the risk of accidents, which is vital in ambulance driving where quick and effective communication of intentions can impact both the safety of the ambulance crew and the public.