What is the first step to take when an emergency vehicle needs to change lanes?

Answer: B — Activate the turn signal to indicate the intended direction

Activating the turn signal to indicate the intended direction is the correct first step for an emergency vehicle needing to change lanes. This action is essential for safety and communication on the road. By using the turn signal, the driver of the emergency vehicle informs other motorists of their intention to merge into another lane, thereby reducing the risk of accidents. Proper signaling is a fundamental aspect of driving courtesy and traffic laws, ensuring that all road users can anticipate the movements of the vehicles around them. In contrast, accelerating quickly to change lanes could create a hazardous situation as it may catch other drivers off guard and limit their reaction time. Honking the horn might not be an effective means to communicate lane changes and can be distracting or alarming to other drivers. Finally, changing lanes without signaling violates traffic laws and safety protocols, making it an unsafe maneuver for an emergency vehicle, which should always strive to maintain professionalism and clarity in its operations.