Guess how to write it

The writing about conjecture is as follows:

After leaving Shanghai Railway Station, I took subway line 3 to our hotel. As Line 3 is built on the ground, I can enjoy the bustling scene of Shanghai through the window. Looking at it, I can't help thinking: 100 years ago, who would have thought that a city would have such a dense population and such a well-connected transportation network? Suddenly, an idea came to my mind: Why not ask what the traffic will be like in 100 years?

So, I mobilized my knowledge reserve and imagination, and fell into fantasy. The scene of 2 100 came to my mind-at that time, the oil-driven car had long since disappeared and was replaced by a mini electric car. As long as I enter the destination, I can automatically determine the route and move freely without manual control.

This kind of car runs on the special track, and it is smaller when refueling, so that now the two-way six-lane road can accommodate 12 cars running side by side; In addition, the intersections have been transformed into overpasses, and there will be no traffic jams on the road. After parking, the car can automatically shrink to less than 40% of its original volume, and try to make enough space.

I continue to guess and think-in 2100, the maglev "railway" was more popular than the current high-speed rail, with a speed of more than 700km per hour and a very cheap fare. From the easternmost point of Asia (Russia) to the westernmost point of North America, a submarine tunnel may be opened, and it takes more than 20 hours to travel back and forth between China and the United States by magnetic levitation.

2 100, the subway network may be denser than the current bus network, and the speed will be greatly improved; In 2 100, there were "cars and planes" that could shuttle through cities, but they may not be popular yet; 2/kloc-in 0/00, ordinary people without physical training can set foot on the moon by space plane, and human beings have begun to plan to immigrate to Mars. In 2 100, there may be a kind of jetpack that people can use to fly in the sky. ...

Just when I was intoxicated with my imagination, my mother took my hand to remind me that my bus had arrived at the station. I just came to my senses, picked up my luggage and got off the bus.