Why is there a traffic jam in Huoqiu section of Shanghai-Shaanxi Expressway?

The traffic jam in Huoqiu section of Shanghai-Shaanxi Expressway is due to bad weather. In June165438+1October, it was rainy and foggy, and the visibility was not high. On the one hand, vehicles are more cautious and slow, on the other hand, accidents occur frequently, and reconstruction and expansion projects occupy some emergency lanes, which makes it difficult to handle and rescue emergencies, resulting in traffic congestion in Huoqiu section of Shanghai-Shaanxi Expressway. Shanghai-Shaanxi Expressway refers to the expressway from Shanghai to xi 'an. Shanghai-xi 'an Expressway, also known as Shanghai-Shaanxi Expressway, is one of the east-west trunk lines of China national expressway network and the expressway from Shanghai to Xi 'an.