Knowing who has the right of way when driving is key to avoiding unnecessary traffic accidents. Typically, state law provides rules about which driver should proceed first when approaching an intersection, and which driver should yield the right of way. While some of these rules simply put common sense into writing, such as the law that you must pull over and yield the right of way to any emergency vehicle when you are driving, other right of way driving rules resolve situations where you may be uncertain as to which driver has the right of way. For example, if you are stopped at a stop sign, and the cross traffic does not have a stop sign, you must yield the right of way to any oncoming vehicles. Likewise, if you are stopped at a four-way stop, the driver who came to a stop first has the right of way. However, if you and another driver arrive at a stop at approximately the same time, you should generally yield the right of way to any driver that is on your right.