Compliance load up to 60t, dual trailer is expected to be legal on the road?

In recent years, the domestic freight market has always been in a relatively depressed situation, on the one hand, the freight has been declining, and even reached a decline of 20% in three years in individual markets, on the other hand, the transport volume and energy conservation and emission reduction pressure are increasing. How to optimize road transportation, improve transportation efficiency and economy, and effectively promote high efficiency and low carbon has become the focus of attention in the industry. As a result, the main energy-saving transport models have emerged, and the double trailer is one of the representatives.

The double trailer is not a new model in China, but it has never been recognized by regulations, so it has not been popularized. Now with the change of the freight environment, the double trailer began to show at the World Road Transport and Bus Congress, does it mean that its spring is coming?

1. What are the benefits of double trailer transportation?

As a representative of efficient and energy-saving transport models, the advantages of double-trailer are simply summarized as more transport, less consumption, and less emissions.

According to the relevant data, compared with the semi-trailer, the transport volume of the double trailer can be increased to about 50%, the average transport unit cost of all kinds of comprehensive cargo combinations can be reduced by about 34%, and the unit fuel consumption in transport can be reduced by 10%. In addition, the double trailer is designed as a car train with a greater number of trailer axles, the carrying capacity can be more evenly distributed over more tires, and the wear on the road surface can be reduced. It will also reduce carbon dioxide emissions, ease driver shortages and enable a sustainable mode of transport.

2, double trailer transport is not in line with the current national conditions

The advantages are obvious, and the disadvantages cannot be ignored. The length of the double trailer is longer, the weight is larger, and the turning or turning on the narrow section is more difficult than the ordinary semi-trailer, which is easy to cause accidents and increase the difficulty of overtaking the car. In addition to the strict screening of the driver, the technical configuration of the vehicle itself must also be strictly up to standard. In addition, although the current domestic road network is the longest and most modern in the world, the vast majority of highway entrances or roundups, bends and so on can not meet the transport needs of double-trailer, service areas or gas stations can not provide suitable parking Spaces. Want to popularize double trailer also need to consider road infrastructure, highway network traffic density, personnel safety awareness, driver training and other factors.

3, what is the application prospect of double trailer?

Although the popularity of the double trailer does need to face a lot of difficulties, the industry's views on it are also diverse, can be seen from the background of the environment, the application of the double trailer or will become a trend, according to industry sources, "fourteen five" during the double trailer will be first tried in some parts of the country. The reason for this is nothing more than the national situation:

The domestic road transport volume is large, the task of energy conservation and emission reduction is relatively heavy, and the realization of the "double carbon" goal is a long way to go, and it is urgent to find a feasible solution. Although the application rate of double-trailer is not high in China, it has been successfully applied in Europe and other countries for many years, and has accumulated rich experience in use, which can provide a reference basis for domestic research.

4, double trailer in the domestic temporary non-compliance

Some domestic enterprises have produced double-hung train series products, but it should be noted that according to the current domestic regulations, those who exceed the GB1589 provisions of the "maximum allowable total mass of the vehicle is 49 tons, the maximum total length does not exceed 16.5 meters, the total length of the car train does not exceed 22 meters" models, is not compliant, so the double-trailer is not allowed on the road. It is a very long and overweight model.

It is said that the new version of the "road vehicle profile size, axle load and total mass limits" opinion draft has been discussing the feasibility of double trailers, many domestic enterprises have also launched feasibility verification, before the clear introduction of regulations, everything is still unknown, after all, from this stage, want to popularize double hanging, the corresponding conditions are still relatively missing, more difficulties, We have to find a workable solution first.

5. What is the experience of using double trailer in foreign countries?

The double trailer is used in many foreign countries, such as Sweden, Finland, the Netherlands, Spain and other countries, the standard connection method is the tractor +13.6 meters standard trailer + trailer connection platform +13.6 meters standard trailer, the total weight does not exceed 72t, a total of 11 trailer axles, the average axle load under full load is about 6.5t. Compared to an ordinary semi-trailer with a total weight of 40t, the average axle load is reduced by about 1.5t.

Foreign requirements for double-trailer drivers are very strict, must have 5 years of truck driving experience, 3 consecutive years without accidents, driving must receive special training. In addition, when driving a double trailer, overtaking is prohibited throughout the whole process, it is prohibited to drive in harsh environments such as heavy rain and snow, and the length of the vehicle must be marked at the rear of the vehicle, and reflective strips and signs must be installed.

At the same time, foreign vehicles involved in double-trailer transport must be equipped with perfect mechanical and electronic assistance systems, such as blind spot monitoring, adaptive cruise, electronic stability systems, etc., requiring the installation of hydraulic retarders, all-vehicle empty suspension and disc braking.

In view of the above content, the application of double trailer in the country may still need a certain amount of time, although the popularity and popularity of the time can not be determined, but the liquid slow + disc brake + empty suspension or will become the standard of double trailer.