What does the sawtooth pattern on the highway mean?

[EmersonFitz]

Highway sawtooth markings are called longitudinal deceleration markings. The following is an introduction to longitudinal deceleration markings: 1. Longitudinal deceleration markings are a group of diamond-shaped dashed lines parallel to the lane dividing line. They are generally set at bridge approaches and turning points. 2. Their main function is to create a sense of compression by visually narrowing the lane, prompting drivers to automatically slow down at curves, slopes, and other locations where deceleration is required. Here is additional information: 1. When a vehicle passes through a section with longitudinal deceleration markings, the driver's subjective vision will perceive the lane as gradually narrowing, prompting them to take deceleration measures and proceed slowly. This can effectively prevent drivers from applying emergency brakes just before the stop line. 2. After entering the sawtooth deceleration markings, drivers must consciously reduce their speed. Typically, electronic surveillance cameras are installed around such markings, and speeding will be immediately captured.