What does the sawtooth pattern on both sides of the white line on the highway mean?

[CarterRose]

Highway white lines with sawtooth patterns on both sides indicate that lane changes are not permitted in this lane. Below are specific details about highway lanes: 1. Speed limits: On two-lane highways, the leftmost lane has a speed limit of 100-120 km/h, while the middle lane is 60-100 km/h. For three-lane highways, from left to right, the speed limits are 110-120 km/h, 90-110 km/h, and 60-90 km/h respectively. 2. Regulations: Strictly adhere to the highway speed limit regulations to avoid accidents caused by speeding. Driving too slowly can obstruct normal traffic flow. During rainy or snowy conditions, drivers should reduce their speed accordingly. 3. Maintaining distance: Under normal conditions with dry road surfaces and good braking performance, the following distance (in meters) should not be less than the numerical value of the speed (in km/h). Always pay attention to roadside distance indicator signs.