What must a driver do when they see emergency vehicles with lights flashing?

When a driver sees emergency vehicles with flashing lights, it is essential to understand that these vehicles are often responding to emergencies and need to pass through traffic safely. The correct response, which is to move to the right side of the road and stop, or alternatively, slow down and pass with caution, prioritizes the safety of everyone on the road.

Moving to the right allows the emergency vehicle a clear path to navigate through traffic, which is crucial in emergencies where time is of the essence. By stopping, the driver also helps ensure that the emergency personnel can operate without obstruction. If a driver cannot safely stop, slowing down and proceeding with caution while passing helps to create a safer environment for both the drivers and emergency responders.

This response helps prevent accidents and ensures that emergency services can do their job effectively, making it a critical part of road safety laws. The other options do not comply with safe driving practices or legal requirements and could hinder emergency response efforts.