When approached by an emergency vehicle displaying signals, what must the driver do?

When approached by an emergency vehicle displaying signals, the correct course of action for the driver is to yield the right-of-way unless directed otherwise. This means that when a driver sees or hears an emergency vehicle, such as an ambulance, fire truck, or police car, they are required to take measures to allow that vehicle to pass safely. This could involve moving to the side of the road and stopping, or otherwise ensuring that the emergency vehicle has a clear path to proceed.

This requirement is essential for the safety of both the emergency responders and other road users. Emergency vehicles often need to reach their destinations quickly to provide necessary services, and yielding enhances their ability to do so without delay or obstruction.

The other options do not appropriately address the need to prioritize the passage of emergency vehicles. Ignoring the vehicle behind is unsafe, speeding up can create dangerous situations, and driving in the opposite direction is unnecessary unless specifically instructed or if that action is needed to clear the way. Thus, yielding the right-of-way is the most responsible and legally mandated action for drivers in such situations.