Editor's note: In recent years, congestion from the Nanning-Liujing section of the Liunan Expressway has become apparent, especially during major holidays such as the Ching Ming Festival. Why is this high speed blocked? What are the reasons? Is there a solution? Recently, the reporter interviewed the relevant departments and conducted a dialysis on the congestion of Liunan Expressway from Nanning to Liujing.

People are blocking their way

At 2:30 pm on April 3, the netizen Rain brought along the old band, starting from Jinhu Square, and proceeding from Nanning back to Yulin Baishan. It took two hours to get to the high speed. Fortunately, it was smooth along the highway.

The people who chose to drive away from Nanning on the way to the night after work were less fortunate. That night, by the early morning, Liunan Expressway from Nanning to Liujing Section lined up for a long line.

In order to avoid traffic jams, the Friends of the Internet set off at 5 o'clock in the morning on the 4th, and when he left at 5.45 o'clock on the exit to the Gandong Expressway, he was still stupid. "A big wave of cars out of town is still late."

On April 6th, on the last morning of the Qingming Holidays, the high speed was very smooth. The netizen even proudly sung the driving record in the circle of friends: Xingye to Nanning, 1 hour and 40 minutes.

However, the situation began to reverse at 2 pm.

At 1:45 pm, a bus carrying 41 people spontaneously caught fire in the Guiliu section of the Quannan Expressway, and the fire burned the vehicle into a skeleton. The accident caused a large number of vehicles on the highway to wait in line.

At 3.30 pm, netizens who finished their business trip in Guilin quickly returned to Nanning from Lingui. Yi Ben thought that this would be a good time to go home for dinner. "Those who want this road have encountered too many accidents. They rushed to the rear or collided with less than 10 kilometers. Most of them were 3-5 consecutive rear-end collisions." 8 pm 30 minutes, easy to arrive in Liuzhou, about 10:00 at night to reach about 6 kilometers from the exit of the six King.

“Sweeping Weibo saw the tip saying that at 9 pm, the vehicles coming from Liuzhou lined up slowly for about 10 kilometers, and the traffic from Yulin and Hengxian to Nanning lined up slowly for about 8.3 kilometers. No way but to move.” At 12 o'clock in the middle of the night, Yi finally moved to the exit of the Six Kings and returned to Nanning at 3:30 a.m. on the 7th.

Why are you blocking?

Why is this section blocked?

Recently, the reporter interviewed the Autonomous Region Department of Transportation, the Development and Reform Commission of the Autonomous Region, Guangxi Expressway Management Detachment, Guangxi Communications Investment Group and other related persons, and combed out the causes.

For one reason, the road network capacity cannot meet major holiday needs.

The Liunan High-speed Six-Ningjing to Nanning section is not only the intersection of the National Expressway Net Quannan Expressway and the Guang-Kun Expressway, but also the major traffic artery and important transportation hub in Guangxi. This brings together traffic from north to south to Guilin, Liuzhou, and Laibin; from east to west to Yuzhou, Yulin, Guigang, Hezhou, and Guangdong, etc., and traffic flows to the eight major cities at the peak of the return to the city. The largest traffic volume of the road.

According to related statistics, in 2014, the daily average natural traffic volume of the section was 24 thousand for the 24 hours and 46,000 for the weekend. The national free Spring Festival, Ching Ming, May Day and National Day holiday was 64,700, and the traffic flow was the largest. The day reached 85,000 vehicles and the traffic overload on major holidays was severe.

During the Ching Ming Festival this year, the daily traffic flow exceeded the maximum of 87,000 vehicles, and the instantaneous and periodical traffic volume was even greater, far exceeding the design normal traffic volume of 25-50,000 vehicles on the Liunan Expressway.

Such a huge amount of traffic must pass through the expressway to and from the inter-city highway in a short period of time, making the expressway overwhelmed. This is the main reason for the slowness of the expressway.

The second reason is that the amount of car ownership has increased, and the public has chosen more and more highways to travel by car.

With the continuous improvement of people’s living standards, there is a growing demand for holiday travel by the public. Taking the 2011-2013 auto ownership as an example, the total vehicle ownership in Guangxi is 1.8887 million, 2.301 million, and 2.7981 million vehicles respectively. The average annual growth rate is 450,000 vehicles and 21.5 percent. As of the end of 2013, The motor vehicle ownership of Nanning and Yulin City, where Liunan Expressway used the main round-trip route, exceeded 1 million vehicles, while the car ownership in the 8 major cities including Nanning, Guilin, Liuzhou, and Yulin via the Liunan Expressway accounted for Nearly 80% of Guangxi.

The substantial increase in the number of car ownership, coupled with more and more people choosing to travel on the highway, is the objective cause of major holiday jams on the Liunan Expressway. .

Reason 3: The policy of free passage of passenger cars and the public’s “blowout”.

According to the analysis, following the implementation of the free travel policy for small passenger cars on major holidays, there are more and more trips by the public during the holiday season. There are specific time limits for the free period, and there is a phenomenon that high-speed vehicles get stuck in the free time period during holidays. The instantaneous or phase-loaded traffic flow on the expressway is too heavy, causing congestion.

The fourth reason is that the capacity of the second channel needs to be improved.

Such a large amount of freeway traffic, but the parallel Binyang to Nanning, Hengxian to Nanning secondary road in major holiday traffic capacity is less than expected, once the emergency situation is not efficient diversion, the effect is not obvious, and the highway failed Form a good match.

The fifth reason is that overloaded vehicles are overloaded, causing the capacity of the expressway to decline.

For example, from the large-scale high-speed trucks on the fast ring in Nanning, the radius of the bend is large, and the road is wide. In particular, the phenomenon of illegal driving such as overloading and overloading is not uncommon, resulting in a decline in highway capacity. At Liujing section, major trucks are also used. Especially when approaching Liujing Bridge, there is a long one-kilometre uphill slope. Many overloaded vehicles and super-wide vehicles climb from the bottom to the top of the slope, and the basic speed is 10 km/h. In the following, some large trucks have to overtake, causing two large trucks to run in parallel, and the rear vehicles have to slow down. At this time, the incoming trains from the direction of Qinzhou and Nanning are rapidly influxing and are easily congested.

The sixth reason is that there are too many bad driving behaviors, and there are many types of violations such as roads.

Because of the large number of vehicles and the overcrowded traffic, everyone has rushed to do so. They are free to plug in and grab traffic, interspersed with each other, and you rush to grab me. Slight scraping and rear-end incidents occur frequently.

Zhang Xi, deputy head of the brigade of the highway management detachment of the Guangxi Traffic Police Corps, said that some were only minor incidents, but some owners were reluctant to follow the traffic police's proposal for quick processing and timely evacuation. They must wait for the traffic police to arrive; once an accident occurs, the emergency rescue lane The phenomenon of being illegally occupied is too common, and it is very difficult for traffic police to rush to the scene for disposal at the first time, so the passages are blocked for a long time and cannot be moved.

Reason 7, the urban road network planning is not perfect.

According to statistics from 2010 to 2014, the average daily traffic volume of the toll stations in Nanning exceeded 20,000, and the peak value exceeded 60,000 vehicles. Before each major holiday, Guangxi Communications Investment Group made special propaganda to the society and guided the passengers and engineers to rationally enter the expressway from the toll stations in Nanning. However, due to inertial thinking, people are still accustomed to choosing high speeds from Nanning toll stations. highway.

In the case of imperfect traffic planning and municipal road construction, the traffic volume has grown significantly, frequent transportation of a large number of busses at the Longdong Coach Terminal, construction of subways, and impracticability of the newly renovated Fenglin Road's canalization project have come from many directions. After the car flowed out of the Nanning toll station, it was affected by the adjustment of the traffic light in front, and the traffic flow would often return to the highway and cause traffic jam on the Liunan Expressway.