What does the sawtooth road traffic sign marking mean?

1 Answers
Pam
07/29/25 3:44pm
The sawtooth line is called a longitudinal deceleration marking. Below is a detailed introduction to the sawtooth line: Function: The longitudinal deceleration marking for the vehicle lane consists of a series of diamond-shaped dashed lines parallel to the lane boundary. Its main purpose is to create a sense of pressure by visually narrowing the lane, prompting drivers to automatically slow down at locations requiring deceleration, such as curves and slopes. Principle: When vehicles pass through sections with longitudinal deceleration markings, drivers will subjectively perceive the lane as gradually narrowing, leading them to take proactive deceleration measures and proceed slowly. This effectively prevents sudden braking by motor vehicle drivers before approaching the stop line. Occurrence range and forms: Generally, high-speed sawtooth deceleration markings are set up at locations such as under bridges, toll plaza areas, ramp entrances and exits, turns, and slopes. They mainly appear in the forms of single dashed lines, double dashed lines, and triple dashed lines.
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