On the morning of the 22nd, Chen Zier got up at seven o'clock, because he had an exam at eight o'clock, and when he went out, he happened to see Shi Yangqing in sportswear, with a white belt on her head and beads of sweat on her cheeks, which rarely exuded a youthful breath from her.

Chen Zier admired and said, "In winter, do you still run in the morning?"

"I'm used to it, and if I don't run for a while, it will interrupt my rhythm. Shi Yangqing gasped slightly.

"Good habits, worth learning. Chen Zier raised his thumb, this is really not easy, it is so cold in winter, and he can still insist on leaving the bed so early every day.

He also runs himself, but he doesn't work in the winter.

Before Shi Yangqing entered the door, he asked Chen Zier: "Do you know how to play tennis?"

He shook his head, this really hasn't been hit.

"Are you interested? I see there's a tennis court downstairs, and it's always empty. ”

"Will you fight?"

"No, I've watched a few tennis matches lately, and I think it's kind of interesting. ”

There's nothing wrong with that, exercise is good for your health, it's a good thing. Chen Zier nodded and said, "Okay, then we have time to learn." ”

Professor Wang personally invigilated the morning exam, and no fraud was allowed, Chen Zier had never thought about this way, and he took the time to take a good look at it yesterday.

In the examination room, Cai Yifeng asked Chen Zier and said, "What happened to you and that Sheng Qianyu recently? Is there a situation?"

Chen Zier said: "Tan Wanxi asked you to ask." ”

Cai Yifeng stiffened, "What does it have to do with her." ”

Chen Zier said: "Concentrate on the exam, be careful not to fail." ”

He didn't want Zhou Zijun to know too early, it was going to be the New Year, and it was best not to make trouble.

Before the exam began, Professor Wang instructed Chen Zier to go to the office when he was done.

The two hours passed quickly, because Chen Zier could still do most of them, and the time passed as he wrote.

After finishing, Chen Zier asked Cai Yifeng to take the pen and book back, and followed Professor Wang to the office.

When he arrived, Professor Wang said, "I've almost revised your paper, and I should show it to you." ”

Chen Zier said: "Professor Wang, it must be no problem for you to modify it yourself, and I may not understand it if you let me see it." ”

The old professor pointed at him helplessly and said, "What about you, you have a lot of ideas and are also very smart, why are you not interested in academics?"

Chen Zier pretended to be obedient and said: "I have a headache when I look at high numbers, I was born, I can't help it." ”

"Secondly... I think there may be no solution to the problem of urban congestion, and no matter how well I learn, it can only be alleviated in the end. ”

Professor Wang taught him: "How can you be afraid of difficulties in academics? You have ideas, I know. But how can we be pessimistic and think that there is no solution? Before the Wright brothers, mankind could not imagine conquering the sky, and if such a difficult thing was done, how could urban congestion not be solved?"

Chen Zier said calmly: "The space of the city is always crowded, in this case, if you want to solve the congestion, the last way out must be in the large-capacity public transportation, but... Considering our national character...... With a car to drive, who wants to switch to the bus?"

Professor Wang was stunned.

The problem of congestion is a problem of total supply and demand, and the traffic demand of any world-class large city is definitely greater than the supply, because there are more people and less land, so you can only find a fine gap in the middle of supply and demand.

Large-capacity public transport can minimize the average share of transportation resources per person. Chen Zier's idea makes a lot of sense. But do you care if the people drive or take the bus?

Chen Zier is right, there is a car to drive, who takes the bus?

And from the perspective of urban transportation, the vast majority of urban public transport systems in later generations are also too poor, waiting for a bus does not know how long, the road is time-consuming, and it is crowded to death, most of the time you have to go to the place and the platform is still far away.

In this case, the comparison between the two, who will choose to drive their own car, from this point of view, and the quality of the actual little relationship, in addition to the price, the bus has almost no advantage.

This is a worldwide problem, and all the methods and concepts that Chen Zier thinks of are to alleviate it, try to improve the service level as much as possible, and it is too difficult to cure it radically.

Professor Wang didn't say anything more, and sometimes he thought about it for himself, and he felt that it was a long way. But no matter how difficult the road is, someone has to walk it.

He still talked about Chen Zier's thesis, "Your idea, I later carefully deduced the logic, I do think that we blindly pursue the idea of the road wide road is problematic, especially your slogan is good, don't build roads for cars, build roads for people, people-oriented, not car-oriented, I have discussed it with several peers, and they praised your idea!"

Chen Zier said modestly: "Professor, I am honored that my little idea can provide inspiration for you, the seniors in the academic world." ”

Professor Wang took the paper to Chen Zier, "You take it back and take a good look, if you think it's okay, let's submit it to the best journal in China, I think it is very likely to be established, and you, a sophomore, will definitely set a record." ”

Chen Zier asked: "What record?"

"In our transportation major at CUHK, there is a precedent for students who have not yet issued Class A top journals, let alone sophomores, even undergraduates, which is not a small honor. Professor Wang forgot about the argument just now and explained with a smile.

Chen Zier hadn't thought about it, and he didn't know how awesome it was or how difficult it was to submit to an A-class journal.

However, he saw that the old professor still wrote his name as the first author, which made him panic.

Chen Zier said: "Professor, you completed the theoretical core part of this paper, and it is not appropriate for me to be the first author." ”

The old professor said, "Oh, don't talk about this. Now many of my graduate students also share the same idea with you, that the core of the thesis is the theory, the mathematical model. I don't understand it that way, there are more people who have mastered mathematical models, but good ideas are not easy to have, the idea of this paper was put forward by you, the first author is of course you, the little work I do, any teacher in the office can do it, you don't have to be too modest, I don't want that name. ”

When Professor Wang said this, Chen Zier didn't know what to say, but just said 'thank you' sincerely.

The old professor was in a good mood and said, "You can take the paper back and see if there are any hard injuries, such as typos or something, I have been busy with a project recently, maybe there will be omissions, you have to be careful." ”

Chen Zier was taught, said that I must look good, and then said goodbye and left.

As soon as he turned around, Professor Wang spread out the design drawings on the table and asked, "Do you have any thoughts on the canalization of road intersections?"

He has been thinking about this question recently, perhaps because he thinks Chen Zier has more ideas.

The so-called canalization of the intersection is to reduce the conflict point between vehicles and pedestrians when crossing the road through some technical means at the four-way intersection, which can increase the traffic efficiency of vehicles and people, and make the whole intersection more smooth and safe.

These include the traffic islands that we often see at intersections, steel fences, and signs, which are added to allow cars and people to enter the lanes that the designers want them to enter, so that everyone can 'go their own way'.

In fact, in the city roads, the most restrictive service level of the entire road network is the intersection, which even people who are not professionals can usually feel, especially in big cities, there is an intersection after two steps, and then a traffic light.

Waiting for a red light takes longer than driving.

Therefore, professional scholars are repeatedly thinking about how to get more vehicles through the intersection in the shortest possible time.

It can be said that the intersection is the short board of the barrel of the urban road, and the better it is, the more vehicles that the urban road can serve.

Chen Zier had heard a little bit of these classes, but he didn't understand the more advanced ones, and he knew about the traffic island.

It's just about channelization......

He looked at the intersection of the drawings on the old professor's desk, and then thought of the intersection he had seen in his previous life, as if something was wrong......

Chen Zier thought about it carefully, and felt that something seemed wrong, so he said tentatively: "Why is the lane on the right still four lanes at the intersection of this one-way four-lane road?"

Professor Wang was puzzled and said, "What do you mean? This is a four-car road, and of course it is also a four-lane road to the intersection." ”

"No, no. Chen Zier waved his hand again and again and said, "We can add another lane to the right lane when we enter the intersection." ”

This is a design that Chen Zier often saw in his previous life, as long as you pay attention to the observation of urban road intersections, whether it is a one-way four-lane road or a three-lane road, at the traffic light intersection, the right lane in all four directions will be added to one lane, this space can be obtained by slightly reducing the width of each lane and compressing a little bit of green belt, or reducing the left lane by one.

The width of a lane on the urban road is generally about 3.5M, and the width of the general car is about 1.7M, at most it will not exceed 2M, and the width of the lane will not cause problems to the vehicle driving by shortening the width of the lane on the entrance road a little longer, and the green belt in the middle provides a little more space, which can completely add one lane, or even two lanes.

And such a small change can increase the capacity of the entire intersection by at least 20 percent.

Professor Wang looked at the one-way four-lane intersection in the center of the picture and muttered: "Your idea is to squeeze out the space of one lane within a few meters of entering the intersection on the right lane in each direction......

Chen Zier nodded: "Yes, isn't this a very common design?"

The old professor was surprised, "How common, where have you seen it?"

Chen Zier didn't know, he didn't study traffic in his previous life, but this kind of design seems to be seen more in the XC area of various cities, and there are really few in the LC area......

Professor Wang himself thought about it and said: "Intersections restrict the traffic capacity of the road, which is like countless nodes on a large network, if the traffic capacity can be improved here, it will increase the traffic capacity of the entire region, and even the urban road system!"

He slapped the table excitedly and said to Chen Zier: "You kid really has yours, how did you come up with this method?"

Chen Zier said: "Listen carefully to your class!"

The old professor was pleased that this method was highly feasible and almost did not increase the cost, but the effect was very good at a glance!

Once these conditions are met, isn't it a genius design!!

The old professor said: "I'll study it now, and see how much traffic capacity can be theoretically improved with your method, by the way, what is the name of this method, do you think about it?"

Chen Zier thought: This is to add one lane by widening the right lane in each direction...... The name......

He blurted out, "Let's call the right way to widen and increase the way!"