A U-turn is allowed on a yellow single dashed line when there is no prohibition sign and it does not affect normal traffic flow. However, a U-turn is not permitted on a single solid line, as it constitutes a traffic violation. According to the "Road Traffic Safety Law," violators will be fined 200 yuan and receive 3 penalty points. On long roads, white or yellow solid or dashed lines are usually marked in the middle section or before intersections. U-turns are prohibited on any solid line. Scenarios where U-turns are allowed: Intersections with U-turn signs: If there is a clear U-turn sign at an intersection, a U-turn is permitted. If there is a U-turn traffic light, follow its instructions. In the absence of a traffic light, make a U-turn based on the situation, ensuring it does not obstruct other vehicles or pedestrians. Intersections without explicit no-U-turn or no-left-turn signs: If there is no clear prohibition, a U-turn is allowed. "No explicit prohibition" means the intersection lacks signs like "No U-turn," "No left turn," or a solid center line, in which case a U-turn is safe. Yellow grid lines also permit U-turns: Yellow grid lines indicate no-parking zones, typically at intersections prone to congestion or near important facilities. While parking on these lines is prohibited, U-turns are allowed unless there is a central barrier. Yellow grid lines without barriers are equivalent to "U-turn permitted." Intersections with U-turn traffic lights: This is straightforward—if there is a U-turn light, proceed only when it is green. When no-left-turn and U-turn-permitted signs coexist: U-turns are allowed, but left turns are prohibited. Note that "No U-turn" is not the same as "No left turn." Precautions when making a U-turn at an intersection: Check road markings: If the line is solid, a U-turn is prohibited under any circumstances. Continue driving to find a suitable spot. If there is a "No left turn" sign, even without a "No U-turn" sign, a U-turn is not allowed at that intersection, as U-turns inherently involve a left turn. U-turns must be made from the innermost left-turn lane. If you are in the second left-turn lane, a U-turn is not permitted at that intersection. Always yield to oncoming traffic and ensure your U-turn does not disrupt the flow of straight-moving vehicles, or you will bear full responsibility for any accident. Near intersection stop lines, lanes often have guiding arrows. Not all leftmost lanes have left-turn arrows; some may have straight arrows. Even without explicit prohibitions, U-turns are not allowed in such lanes. U-turns on crosswalks are also prohibited and constitute a traffic violation.
