What is the difference between having a center line and not having a center line?

[CharlotteMarie]

The difference between having a center line and not having a center line lies in the traffic rules. The center line refers to the long yellow or white straight line in the middle of the road. The road center line is used to separate lanes in different directions and is painted in the middle of the road as a divider, splitting the road into two directions. Whether it is a single yellow line or a double yellow line, as long as it is a solid line, crossing is strictly prohibited, such as overtaking, turning, or making a U-turn. When driving, you should not cross the line unless under special circumstances. Whether it is a single yellow line or a double yellow line, if it is a dashed line, you can overtake or make a U-turn when it is safe to do so. When driving on the road, motor vehicles must not exceed the speed indicated by speed limit signs or markings. On roads without speed limit signs or markings, motor vehicles must not exceed the prescribed maximum speed. For roads without a center line, the speed limit is 30 km/h in urban areas and 40 km/h on highways. For roads with only one motor vehicle lane in the same direction, the speed limit is 50 km/h in urban areas and 70 km/h on highways.