Superior Right of Forward Vehicle (SRF) is a legal doctrine in some jurisdictions that gives a right-of-way to the first vehicle that has approached an intersection. This doctrine applies when two vehicles reach an intersection at the same time and there is no clear indication of who has the right-of-way. In this situation, the vehicle that is farthest to the right has the SRF. The SRF doctrine applies to vehicles entering an intersection from the same street. It does not apply to vehicles coming from different streets or when one vehicle is stopped at a stop sign or stoplight. There are two types of SRF: active and passive. Active SRF applies when two vehicles approach an intersection at the same time and the first vehicle to reach it has the right-of-way. Passive SRF applies when two vehicles approach an intersection at the same time and neither vehicle has a clear right-of-way. In this situation, the vehicle that is farthest to the right has the SRF. The SRF doctrine is meant to promote safety and reduce the risk of collisions at intersections. It is important to understand and follow the SRF doctrine to ensure the safety of all drivers.