Part of a bridge ramp collapsed over an expressway Saturday in Ezhou, Central China’s Hubei province, killing four and injuring eight. Photo: Chen Liang/Caixin

Three trucks fall along with a bridge ramp, crushing a car underneath during the accident, according to reports. Photo: Chen Liang/Caixin

The three fallen trucks were linked into a group. The load of one truck surpassed the weight limit of the bridge. Chen Liang/Caixin

The crashed tractors weigh 10 tons each. Photo: Chen Liang/Caixin

Truck parts are seen scattered on the accident site on Sunday morning. Photo: Chen Liang/Caixin

A trailer is seen overturned at the accident site on Sunday morning. Photo: Chen Liang/Caixin

A container is found on a trailer Saturday night at the site. The overloaded trucks got on the highway on Dec. 14 from Lintong, Northwest China’s Shaanxi province. Photo: Chen Liang/Caixin

The collapsed bridge ramp measures 500 meters. China’s Ministry of Transport ordered emergency rescue work after the incident. Chen Liang/Caixin

The bridge connecting the Shanghai-Chongqing expressway and Daqing-Guangzhou expressway was opened to traffic in September 2010. Photo: Chen Liang/Caixin

The ramp, which was held by single piers, was reinforced in November 2020. There is no data pointing to quality problems of the bridge before the accident. Photo: Chen Liang/Caixin