First stretch of new Genoa bridge goes up after deadly 2018 collapse

Just over a year after the Genoa motorway bridge collapse that killed 43 people, workers Tuesday raised the first 50-metre (54 yards) stretch of a replacement designed by famed architect Renzo Piano.

A siren blared as the vast section of deck was hoisted by cranes some 45 metres up to sit across two concrete piles, the first of 18 that will support a streamlined and luminous white bridge conceived to resemble the hull of a ship.

"This morning is special. This is not the laying of the first stone, but a launch. Just like for a ship, except that this time we are not setting out to sea, but going upwards," Piano said as he arrived on site.

The Genoa native, whose has designed buildings including the Centre Georges Pompidou in Paris and The Shard in London, told the construction workers to "be careful" as they performed the "acrobatic" job of elevating the mammoth deck.

Part of the so-called Morandi highway in the northern Italian city collapsed during heavy rain on August 14, 2018, hurling dozens of cars and several trucks onto railway tracks below.

The bridge's two remaining towers were demolished in a giant blast in June to make way for the new structure, which will be 1,067 metres long and be made up of 19 decks of varying length.

"The tragedy stays with you, the victims stay with you, the displaced stay with you," Piano told AFP.

"More than solace, it is moment of redemption".

The section of the new steel and concrete bridge raised on Tuesday with giant cranes is 26 metres wide and 550 tons.

"From today onwards, the people of Genoa and tourists will see the first piece of the bridge, which will continue to grow outwards until it reaches either side of the valley," the city's mayor Marco Bucci told reporters.

The structure will open to traffic by the end of April 2020, he said.

"The bridge has the people of Genoa's DNA in it," Bucci said.

"It's strong as steel and looks like a ship. That is a great symbol, because our wealth has come from and via the sea."