What does the high-speed fishbone line mean?

[DiGavin]

High-speed fishbone lines are designed to alert vehicles to slow down in advance and also to remind drivers that the section is prone to accidents, requiring careful observation of the surrounding conditions. Typically, speed limit signs are posted near fishbone lines, and drivers should slow down when approaching them. Fishbone lines are not only found on highways but also on some urban roads, with markings resembling bones. There are two types of fishbone lanes: one with a dashed line in the middle and another with a solid line in the middle. When driving, if you encounter a fishbone lane with a dashed line in the middle, lane changing is permitted; however, if the fishbone lane has a solid line in the middle, lane changing is not allowed.