What should be placed behind a vehicle when it breaks down?

[VanTalia]

When a vehicle breaks down, a warning sign should be placed at least 150 meters away from the direction of oncoming traffic. Below is some relevant information about automobiles: 1. Introduction: In 1680, the renowned British scientist Newton conceived the idea of a jet-powered car, which utilized steam ejected from a nozzle to propel the vehicle, but he failed to build a physical prototype. 2. Gasoline: 1885 was a year of decisive breakthroughs in automobile invention. At that time, Benz, who worked in the same factory as Daimler, was also researching automobiles. 3. Electricity: The world's first research on electric vehicles was conducted by Hungarian engineer Ányos Jedlik, who completed an electric transmission device in his laboratory in 1828. The first practical electric vehicle was invented by American Anderson between 1832 and 1839. The battery used in this electric vehicle was relatively simple and non-rechargeable.

[McKyle]

Last time my car broke down halfway, my first reaction was to quickly take out the triangular warning sign. This thing must be placed at least 150 meters behind the car on highways, and at least 50 meters away on regular roads. Remember to place it directly behind your car's lane; if it's a curve, you should set it up even farther ahead for safety. After placing the sign, quickly move with passengers to the outside of the guardrail to wait for help—don’t squat behind the car. I’ve really seen news reports where secondary accidents happened when cars rolled right in. At night, you also need to turn on the hazard lights and even wave your phone’s flashlight a couple of times—drivers really can’t see well on dark roads.

[SanHaley]

The warning triangle is an absolute lifesaver. Once I had a flat tire but forgot to bring it, and the car behind almost rear-ended me. Now I always keep a reflective version in my car year-round—it folds down to just palm-sized. Special reminder for EV brothers: regular triangles are too low, so get the type with a stand that extends to 1.2 meters. Better yet, stash a reflective vest in the glove box—it makes you way more visible on highways. Oh, and if you break down in foggy conditions, remember to turn on your width lights along with the hazard flashers—many people overlook this.

[DeAdam]

For beginners who tend to panic, remember these three steps: turn on hazard lights, place the warning triangle (walk 50-100 meters back to set it up), and evacuate (move everyone beyond the guardrail). Don't just toss the warning triangle on the ground—unfold its red reflective side to face oncoming traffic. In rainy or foggy conditions, turning on front and rear fog lights enhances visibility. If you don't have a warning triangle, you can tie a red piece of clothing to a branch as a temporary measure, but this is only for emergencies.

[VonValeria]

In addition to the warning triangle, I always keep a reflective vest and glow sticks in my car. Last time when my car stalled in a bridge culvert during a heavy rain, I got completely soaked before remembering to set up the warning sign. As soon as I put on the reflective vest, the following cars started slowing down from 50 meters away. On urban roads, special attention should be paid to the placement of the warning triangle—placing it right in the middle of the lane can actually be dangerous. It's better to attach it to the guardrail or use a magnetic version to stick it on the rear bumper. The newly released foldable magnetic warning triangle now costs only thirty yuan.

[OWalker]

Experienced drivers all know not to skimp on the warning triangle—buy a good one. Those cheap ten-dollar plastic sheets can blow away with a gust of wind. I bought one with a weighted magnet at the base, which stays upright even in heavy rain. If you break down at night, don’t turn off the engine immediately—keep the parking lights on. On highways, you can estimate distance by counting the road markings: each white line is 6 meters, with a 9-meter gap in between. About 150 meters would be roughly ten sets of lines. For downhill sections, the triangle must be placed at the top of the slope to be effective—I learned this the hard way once in the mountains.