Why is there a traffic jam in Tangguantun, Beijing-Shanghai Expressway?

Road congestion, accidents, construction, etc.

1. Road congestion: Tangguantun section of Beijing-Shanghai Expressway is an important traffic trunk line connecting Beijing and Shanghai, and the traffic volume is large, especially during holidays or peak hours, which easily leads to road congestion. Because this section is the only way in and out of Beijing and Shanghai, it will also be affected by weather, traffic control and other factors, further aggravating road congestion.

2. Accidents: Traffic accidents on roads are also one of the common causes of traffic jams. After the accident, the traffic flow was restricted, and vehicles could not pass normally, resulting in traffic jams. Especially on the expressway, it takes a long time to deal with accidents, which will cause long-term traffic congestion.

3. Architecture: Road construction is also one of the causes of traffic jams. In order to ensure the safety and maintenance of roads, road maintenance, reconstruction and other construction operations are often carried out. During the construction period, the road capacity is reduced, and vehicles have to detour or slow down, resulting in traffic jams.