What is not a valid reason to make a U-turn?

Making a U-turn on a one-way street is not allowed because it violates the traffic regulations governing the flow of vehicles. One-way streets are designed to direct traffic in a singular path, and making a U-turn would counteract this system, potentially leading to confusion and increasing the risk of accidents. In contrast, U-turns can be legally made at traffic lights, stop signs, and in parking lots under certain conditions, provided that it is safe and permitted by local traffic laws.