What does the sawtooth line on the road mean?
3 Answers
Road sawtooth lines represent variable lanes, which change their directional markings according to traffic flow. Here are relevant explanations about road sawtooth lines: 1. Applicable road conditions: These are mainly used for sections where traffic is concentrated during peak hours but lanes are insufficient, or where there are significant differences in bidirectional traffic flow during morning and evening rush hours. 2. Penalty regulations: According to the "Road Traffic Safety Law", vehicles must follow the road markings and traffic signals at intersections. Violations may result in penalties for disobeying prohibition signs/markings, including a 100-yuan fine and 3-point deduction from the driver's license.
The sawtooth lines commonly seen on highways indicate no overtaking is allowed in that section, typically appearing in hazardous areas such as sharp turns, steep slopes, or tunnel exits. With over twenty years of driving experience, I've encountered this marking numerous times. It serves as a silent warning sign, alerting drivers to potential dangers ahead and the need to slow down. Once on a mountain highway, spotting the sawtooth lines prompted me to maintain my speed, and sure enough, there was a traffic jam due to an accident ahead. My timely reaction prevented a rear-end collision. These lines are designed to be highly visible precisely to prevent accidents—never ignore them while driving. Staying alert to road conditions and adhering to traffic rules can significantly reduce risks, protecting both yourself and other road users.
From a road design perspective, the highway zigzag markings are a clever design that enhances driver alertness through visual impact. After studying human visual psychology, engineers opted for zigzag lines because they are more easily recognized by the brain than straight lines, especially in adverse weather conditions. The purpose is to mark no-overtaking zones, reducing overtaking behaviors in hazardous areas and thereby lowering accident rates. Research data shows that after installing zigzag lines, accidents on relevant road sections decreased by nearly 20%. This made me realize that simple tools can also save lives, and I recommend drivers pay more attention to road changes and cooperate by slowing down to ensure safe driving.
