First, its is always required that you pull into the other lane if there are multiple lanes to ensure that the emergency vehicle is given plenty of room to do their jobs. Additionally, many states also require that you slow down when passing emergency vehicles that have their lights on. This ensures that you will have more time to react in the case of an emergency.
Finally, drivers should note that if they fail to abide by any of these laws, they can be subject to fines. This is because failing to follow these rules puts the lives of first responders in unnecessary danger.