November 3 evening, a semi-trailer carrying a tower crane traveled from south to north along the Lanhai Expressway.After 17-kilometer-long downhill section, it traveled 50 meters from Lanzhou South Toll Station and occurred with vehicles waiting in line for payment. Collision, causing 15 dead, 44 injured,10 serious injured. 31cars were damaged. The driver was slightly injured. After the incident, he was immediately controlled by the public security organs and is currently under investigation. According to his own explanation, the vehicle was out of control due to continuous downhill and…