As we all know, the highest speed limit of the expressway in our country is limited to 120km/h, and the car's speed meter is mostly in the 240km/h, which causes the vehicle to go to the 120km/h easily in the condition of the car condition, so that people have to decelerate. But more time, the car condition is not good, such as the road congestion, interval velocity measurement, the daily speed can only go to about 90km/h, speed can not come up.

The maximum speed setting is also for safety consideration. Based on the current road factors in China, the road friction coefficient, the strength of the protection fence, the width of the lane, the slope, the radius of curvature and the size of the sign are designed according to the 120Km/h standard. If the standards are raised hastily, the relevant design will have to be remade, and the cost of rebuilding the expressway is very high.

But this setting is about to be broken. At the beginning of this year, Zhejiang province first proposed the concept of "superhighway". The Hangzhou Expressway in Hangzhou, Shaoxing and Ningbo will be built into a "smart, fast, green, safe" "super high speed public road" in Zhejiang, Shaoxing and Ningbo. The expressway is not expected to be put into operation until 2021, and will become a demonstration spot of the expressway in the future.

Draw lessons from the high standard of foreign leading technology

According to the person in charge of the section, this "super highway" draws on the speed limit of the German Expressway and the corresponding technical standard of the maximum speed limit of 150 km / h in Italy, and reserve the technical index for the speed of the long term breakthrough of the design speed of 120 km / h in Hangzhou.

Maximum speed of 150km/h,  reality of " Fast and the Furious "

According to this "super highway" design standard, the speed can reach up to 150km/h. After completion, the average speed of daily 90km/h is increased to 20% - 30%, and the passage time between the two places is shortened.

Green side open side charging

Not only speed but also a lot of "black technology". With the trend of electrification, the superhighway will charge new energy vehicles in service areas and toll stations through solar power, photovoltaic power generation, and charging piles. In the future, we plan to achieve mobile charging, both charging and driving.

Unmanned driving is the ultimate goal

This superhighway will be designed to improve the safety of the road system by intelligent and fault-tolerant design, to minimize the damage to the accident, and to achieve the all-weather rapid traffic. The long-term plan will be based on high-precision positioning, vehicle-road coordination, driverless and other integrated technology access system, for the future driverless ready.

But speed raising is a good idea, but there are many problems that must be faced:

1) driver's quality

There are no speed limits on some expressways in Germany, but the probability of traffic accidents is very low, which is closely related to the level and quality of drivers. The German driver's license is very difficult to test, not technical failures, mainly the harsh safety awareness is easy to make mistakes, which is the opposite of us. At the same time, Germany's industrial rigour is recognized by the world, although part of the section is not limited speed but also marked the most ideal speed control in the 130km/h, some bus cars, in every 1 hours to the service area, but not to refueling, but forced to rest. Take a look at some of the examples around us, some of the trucks and buses that open for more than 10 hours are not in the minority. In addition, the overtaking is also a common meal, and the safety consciousness needs to be strengthened.

2) test the performance of the vehicle

In a lot of cars on the market, the overall speed and stability of the German car is recognized by many people. It is not limited to the speed of the German highway and has a certain connection to the high speed stability design of the vehicle. There are many local brands in Germany, and the vehicles are also rich in security. Most people buy cars mainly by local brands, so the vehicle performance is basically consistent. In the country, the car brand is uneven, and even the air bag is not, the speed of running 120km/h is already very dangerous, and the rate of accident recovery is basically 0 when 150km/h. Some other van, wagons and heavy trucks are far from the upslope, even when it comes to emergency brakes. Therefore, under such conditions, if the speed limit is too high, the speed gap between all types of vehicles will be too large, further increasing the probability of accidents.

Summary:

In a comprehensive way, in China, although the hardware is achieved, but because each person's driving habits are different and the performance of the vehicle is uneven, it can not reach the safety standards of the driver in Germany, so it is difficult to improve it even though the speed is increased by 150km/h. However, this move provides a great impetus for the future of high-speed development and construction, especially the move of mobile charging is still very epoch-making. At the same time, with the follow-up in the relevant laws and regulations and intelligent safety management, I believe that the result is still expected.