ROME, Oct 2 (Reuters) - Italian construction magnate Matterino...

ROME, Oct 2 (Reuters) - Italian construction magnate Matterino Dogliani is considering bidding for a controlling stake in motorway operator Autostrade per l'Italia (Aspi), Bloomberg said on Monday, citing anonymous sources with knowledge of the matter.

Dogliani's family company Fininc is looking at teaming up with an international investment firm for a friendly offer of about eight billion euros ($8.40 billion) that would value Aspi around 20 billion euros including debt, the report said.

If it were to go through, the transaction would be one of Italy's biggest mergers and acquisitions deals in the last decade, Bloomberg said, adding that the Italian government "might" support it.

Aspi was bought last year from the Benetton family's Atlantia company by a consortium led by Italy's state lender Cassa Depositi e Prestiti (CDP), also including international funds Macquarie (MQG) and Blackstone BX.N .

The Benettons sold the asset, which manages around 3,000 kilometres of motorways in Italy, after coming after strong criticism from the government for the 2018 collapse of a bridge along its network in Genoa, in which 43 people died. ($1 = 0.9518 euros)