WEIGHT OF TRAFFIC

However the bridge's condition, and its ability to sustain large increases in both the intensity and weight of traffic over the years, have been a focus of public debate since Tuesday's collapse, when an 80-metre span gave way at lunchtime as cars packed with holidaymakers as well as trucks streamed across it.

Deputy Prime Minister and Interior Minister Matteo Salvini said the private sector manager of the bridge had earned "billions" from tolls but "did not spend the money they were supposed to" and its concession should be revoked.

He was apparently referring to Autostrade.

"Imposing the highest penalties possible and making sure that those responsible for the dead and the injured pay up for any damages and crimes is the very least," he said.

Fire brigade spokesman Luca Cari said 400 firefighters were at the site, lifting big chunks of concrete to create spaces for rescue teams to check for survivors.

Italy's transport minister said on Wednesday he had begun a process to strip Autostrade of its concession and he demanded top Autostrade managers resign.

"Autostrade per l'Italia was not able to fulfill its obligations under the contract regulating management of this infrastructure," Danilo Toninelli said on RAI 1 state TV, adding that he would also seek to levy heavy fines against the company.