A friend spoke before: When I was driving, there were 3 seconds left at the traffic lights ahead, so I stopped for safety.

Instead, I was scolded by the driver behind me and almost got off the bus to fight with me. Are drivers so angry now?

Why are you being scolded?

Suddenly stepped on the brakes when parking.

I asked him, "Did you stop without observing the rear and give him an emergency stop?"

I ask because a friend I don't know has a driver's license for less than 1 year, which may happen.

Yang Da of Southwest Jiaotong University has a doctoral thesis "Modeling and Analysis of Car-following Behavior Considering the Rear Car", in which a survey is made on whether the driver will pay attention to the rear car.

The result is as follows: only 54.9% drivers drive for less than 1 year, a little more than half will observe the situation of the rear car, and half will ignore it.

/kloc-86% of drivers from 0 to 3 years will observe the situation of the rear car. The longer you drive, the more people will pay attention to the situation of the rear car.

When following a car, if the front car doesn't pay attention to the situation of the rear car, suddenly "hmm", you will stop, right? What if the back doesn't stop? I can't respond. Bang, right? I touched it.

Cao, Ph.D. thesis of Jilin University, "Study on the Complex Dynamic Characteristics of Traffic Flow and Traffic Congestion", which is also mentioned.

In a simple case, the reaction time of a mentally prepared driver is about 0.68s, which is fast, right? If this is the case, the reaction time will be greatly increased without psychological preparation.

Even if the speed of driving in the city is 30km/h, it's okay, isn't it fast? At this time, the braking distance is about 6m and the reaction time is 1s, so it takes about 15m to avoid collision.

Most masters will not leave such a long distance when driving in urban areas, so it is easy to be dangerous. Even if there is a false alarm in the end, it is likely to be cursed, right?

The back car thought it could pass, so it stopped his way.

But my so-called friend said, "Hey, that's not the case."

"The master came down and shouted at me,' Why don't you rush over, then rush over, right? I could have rushed with you, but you did. It is said that more people like me will cause traffic jams. "

I said to him, "In a sense, what the master said is actually right."

Cassus published a paper "Ghost Traffic Jam-Fluid Mechanics Model of Traffic Jam" in the magazine Science Fan, which was mentioned above.

Any slight speed change may be transmitted all the way in the traffic flow, and it will be amplified continuously, and it is likely to become a traffic jam in the end.

As mentioned in our video before, there is an actual data of traffic police.

A motorcade with a speed of 40km/h, with many cars, suddenly has a slow train of 1, which may continuously affect 10 to 20 cars behind, and the influence distance may reach about 500m.

It's like waiting in line to cook in the cafeteria. There is a man over there: "big row, hey, no, let's row, hey, no, no, still big row."

Just because he came for a while, he dawdled for two more minutes, and the last person behind him might have to wait 1 hour, which is the fact.

Are you going to rush or not?

As a result, my imaginary friend felt even more wronged when he heard it. He asked me, "Do you have to go there at any time?" It's dangerous. I obey the rules, don't I? "I told him," it depends. "

In the safest case, you can really rush.

If you have a wide view of the intersection and you are sure that you can really cross the line within 3 seconds, then normal driving is no problem, and it is not called "rushing". It just doesn't slow down, does it?

Refer to the national standard GB 5 1038-20 15 "Specification for Setting Traffic Signs and Marking Lines on Urban Roads": The length of guide lane lines is generally between 30-70m.

Let's take a median of 50m, or calculate according to the speed of 30km/h mentioned above, which is almost more than 6s, and 3s is not enough; Even if the speed is faster, it will take more than 3s to drive to 60 km/h.

That is to say: look, there are 3 left at the traffic lights. When flashing or counting down, you should at least ensure that the guide lane has gone half, or even more than half.

Isn't the dotted line in front? Isn't this intersection a solid line? I'll separate you one by one. If you turn left here and then go straight here, that's the guide lane.

You're halfway through this solid line, or even more than half. It's safer to drive at this time. You really have to stop when you first arrive.

Another friend said, "Isn't there still three in the yellow light?" In fact, the risk of running a yellow light is quite high.

First of all, the accident rate of running a yellow light is not low.

Xin Xiuying, Ma Shoufeng and others published a paper in Traffic Information and Safety, "Analysis of Influencing Factors of" Running Yellow Lights "Decision-making Based on Intention Survey Method", with data on it.

Traffic accidents during the yellow light period account for more than 50% and more than half of the traffic accidents at the whole signalized intersection.

If there is an accident when you run a yellow light, you may still be fully responsible. The accident probability just now, followed by the attribution of responsibility.

In August of 20021year, Chongqing rule of law newspaper reported a case: driver Liu saw that the traffic lights at the intersection ahead had turned yellow. He didn't want to wait for the next green light, so he slammed on the accelerator and accelerated through the intersection. As a result, he just hit an electric car.

Finally, the traffic police sentenced Liu to take full responsibility, deducted 6 points and fined 200. Fine is a trivial matter, and deducting points may be a bit uncomfortable. What if you hit someone? Right?

What about the obvious situation?

If you haven't entered the guide lane and the green light is only 3 seconds, then stop. Don't worry about the noise, slow down.

The car has entered more than half of the guide lane, drive past.

So generally speaking, when there are 3 seconds left in the green light, if you have reached the lane with solid lines and white lines, most of them have already left, and almost passed, then you can just go directly.

If you see that the light has not entered this solid line, or just entered a little bit, slow down and leave some reaction time for the car behind.