Making a U-turn over a double solid line is a traffic violation. According to Article 90 of the Road Traffic Safety Law, violators who cross prohibited markings will be fined 200 yuan and receive 3 penalty points. On long roads, white solid lines are usually present in the middle sections or before intersections. If the lines are yellow dashed or white dashed, U-turns are permitted. However, U-turns are strictly prohibited on any solid lines. Permissible U-turn situations: If there is a clear U-turn sign at an intersection, a U-turn is allowed. If there is a U-turn traffic light, follow its instructions. In the absence of a traffic light, assess the situation and make a U-turn only if it does not obstruct other vehicles or pedestrians. U-turns are allowed at intersections without explicit "No U-Turn" or "No Left Turn" signs: If there are no signs prohibiting U-turns, you may proceed. "No explicit prohibition" means the absence of "No U-Turn" or "No Left Turn" signs and no solid lines in the center of the road. U-turns are also permitted on yellow grid lines: Yellow grid lines are no-stopping zones marked at intersections prone to congestion due to temporary parking, important facility entrances, or other designated areas. Stopping on these lines (including waiting at traffic lights) is a violation. Although parking is prohibited in yellow grid zones, U-turns are allowed if there are no central barriers. 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 appear together: U-turns are allowed, but left turns are prohibited. Note that "No U-Turn" is not the same as "No Left Turn." Important considerations when making a U-turn at an intersection: Check road markings—if they are solid lines, U-turns are 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, U-turns are not allowed at that intersection because 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, U-turns are not permitted at that intersection. Always yield to oncoming traffic before making a U-turn. Failure to do so will make you fully liable for any accidents. Near intersection stop lines, lanes often have guiding arrows. The leftmost lane may not always have a left-turn arrow—some may have straight arrows. Even without explicit "No U-Turn" signs, U-turns are prohibited in such lanes. U-turns on crosswalks are illegal and constitute a traffic violation.
