What is the maximum speed limit for motor vehicles when turning or making a U-turn?

[Pinto]

When a motor vehicle is descending a steep slope, turning, or making a U-turn, the maximum speed must not exceed 30 kilometers per hour. The speed regulations for vehicles are as follows: Roads without a centerline: On roads without a centerline, the speed limit is 30 kilometers per hour in urban areas and 40 kilometers per hour on highways; Single-lane roads: On roads with only one lane in the same direction, the speed limit is 50 kilometers per hour in urban areas and 70 kilometers per hour on highways. Speed must not exceed 30 kilometers per hour: Under the following circumstances, the maximum speed for motor vehicles must not exceed 30 kilometers per hour (with tractors, battery-powered vehicles, and wheeled special machinery vehicles limited to 15 kilometers per hour): when entering or exiting non-motorized lanes, passing through railway crossings, sharp curves, narrow roads, or narrow bridges; when making a U-turn, turning, or descending a steep slope; when encountering fog, rain, snow, sandstorms, or hail with visibility within 50 meters; when driving on icy, snowy, or muddy roads; and when towing a malfunctioning motor vehicle.