Miss Okazaki's Nishito apartment

"Why can't we go?" Yuan Tai protested loudly. "We're a group of young detectives!"

"Shut up!" Mori Kogoro, who was sitting in the passenger seat of the police car, directly deterred him with a loud roar in the style of a hair dryer. "Don't get involved in this kind of trouble, children!"

"But if you don't let us go, we'll have two adults and five children on our side," Mitsuhiko reminded. "If we don't let the two of us, the next car that will pick us up and take us to the detective's brother's house shouldn't be able to carry us, right?"

"Don't worry about these questions," their guide looked at Mitsuhiko with a smile. "In this case, I will return to the nearby guide station to take a break, and when the situation is over, I will continue to take you on a tour of the beautiful scenery of Osaka."

"So, you're just waiting here, you know?" Maori Kogoro said unpleasantly. "This kind of professional work is left to professional people, so you should hurry up and take a break and enjoy the food of Osaka! I run around every day, and I haven't even eaten Osaka's food since then, so I'm really embarrassed to say that I've been to Osaka? ”

"Alright, kids," Dr. Asasa patted Motota and Mitsuhiko on the head. "Listen to Uncle Mori, let's wait for the police headquarters to pick us up and take us to Hattori's house for a break. I'll promise to take you out for something delicious in the evening. You see, even Qianyu and Xiao Ai didn't go with them.

Behind them, Chiba and Ash Hara just quietly accepted the gaze of Mitsuhiko and the others looking back.

"There's already the top detective in the West over there," Chiba shrugged. "There's no need for us to get involved, after all, it's a technical murderer, and if we target you and me, we won't even have a corpse to collect."

"And what about Conan?" Ayumi was clearly worried.

"He's following that Hattori Heiji," Chiba spread his hands. "Don't worry, where that Hattori is here, there will be almost unconditional and unconditional support from the entire police headquarters, and they are not something that the murderer can approach and assassinate anyway."

Unless... Chiba pondered this possibility in her heart. Unless the body will fall into the car is really not some coincidence of coincidence, but inevitable...

…………

About 30 minutes later, the police car was moving down the road.

"Has it been so blocked all along?" Mitsuhiko looked at the large field of cars in front of him.

"I don't know, but this section is easy to get stuck in traffic." Officer Otaki, who was in the driver's seat, said helplessly. "Obviously, there are no more lanes or fewer lanes or traffic lights, but there is always a large-scale traffic jam from time to time, and it will be blocked for a long time."

"There are no lanes reduced and no traffic lights?" Mitsuhiko's eyes widened. "Then why is there congestion over here?"

"There are too many cars." Motota replied. "It would be much better if there were fewer cars, right?"

"But why do so many vehicles lead to traffic jams?" Mitsuhiko asked rhetorically. "I mean, in a place where there are no lanes and no traffic lights, how did the traffic jam happen in the first place?"

The audience was silent.

"It's what it should be." Chiba glanced at Mitsuhiko. "Is there any special reason for this?"

"How did the 'how it should be generated' come about?" Mitsuhiko continues to play the role of a curious baby.

"Uh-" Chiba sighed. "I'll give you an example, if everyone is driving forward now, and the car in front of you suddenly brakes, what do you think Uncle Otaki will do?"

"Then ......," Mitsuhiko glanced at the vehicle in front of him. Brakes must have it? ”

"And then what will happen to the car in the back?" Chiba continued to ask.

"Then, of course, I still choose to brake!" Mitsuhiko continued to answer.

"The other cars behind are slowing down, you understand, right?" Qianyu continued to ask.

"Hmm." Mitsuhiko nodded.

"Next question," Chiba asked again. "We apply the brakes immediately after seeing the car in front of us brake, but we only notice when the car in front slows down significantly, and it takes time for us to apply the brakes, and it takes time to slow down. In other words, there may be a time difference of one or two seconds between the car in front of you and our car slowing down significantly. Is this understandable? ”

"And then, there's a similar delay when the car accelerates. A delay of two seconds for one car is one minute for thirty cars. This means that if the first car starts braking or pressing the accelerator, it will take nearly a minute for the thirtieth car to follow. Delays that don't seem very long for each driver once they add up and pass on continuously, then the total delay can be quite long. ”

"I've read the files of a programmer named Taku Itakura a few years ago," Dr. Asasa said, turning his head as well. "Because the action of braking and pressing the accelerator between each car requires a reaction time to be transmitted, if you look directly from above, the action of braking and pressing the accelerator will be transmitted from the car in front to the car behind like water waves, like the ripples of a stone on the water."

In view of this property, he asked his friends to do an experiment - he invited thirty-one friends to drive a car at a constant speed on a circular track. Note that he specifically asked his friends to drive at a constant speed. Although the track is not long, the thirty-one cars still have enough distance between the front and rear to ensure safe driving. But despite this, after about ten minutes, there was still confusion throughout the annular orbit. ”

"Really?" Mitsuhiko was surprised.

"It's true," Dr. Asasa nodded. Later, his friends said that after driving for a while, the movement of the car in front of them suddenly became extremely irregular, sometimes fast and sometimes slow, like a drunk man who has been drunk, so that they can only adjust their speed at any time. In fact, the reason why the car in front is fast and slow is precisely because the car in front of the car in front also faces the same problem as this car - each of the more than thirty people makes artificial adjustments to their car will affect the next car, and the change after the next car is affected will affect the next car in a more complex way. And then keep influencing the whole cycle, and let the influence you have go through a cycle and then affect yourself and everyone else. ”

At this moment, the intercom system of the police car suddenly rang. "Otaki, can you hear me?"

"I can hear me, what's wrong?" Officer Otaki hurriedly connected the intercom system and responded.

"Someone called the police to say that their relatives in the Xidu apartment near you may be in danger, and I hope you can take a look."