It is one of Italy’s busiest motorways, especially in the holiday season. It is the main artery from southern France to the Italian coast, passing through the heart of the northern city of Genoa.
Today in the midst of a thunderstorm, one of the main bridges on the motorway collapsed. Lorries and cars plunged 90 metres to the ground below.
At least 20 people are known to have died and rescue workers are still attempting to free survivors from the rubble. The Italian Transport Minister, Danilo Toninelli, has called it an “immense tragedy”.