How much does the TAV Lyon-Turin

The costs charged to Italy for the connection to Turin, according to the report presented to the European Union in 2006 would stand at around 17 billion euros.
But the dossier submitted to 'the European Union in 2010, brings the cost estimates to 35 billion euros, against Italy, excluding a variety of related works, such as connecting to the node Turin, infrastructure to house the workers and tens ancillary works to a building site would result in 20 years.
But we remain at 35 billion and see what could happen, following the experience of the Italian high speed lines.
The expenses of the Rome-Florence grew by 6.8 times compared to the estimates, those of the Florence-Bologna 4 times those for the Milan-Turin 5.6 times. We are talking about official figures, well known, and on which the judiciary is trying the same answers.
If, on the basis of this experience we choose the multiplier lower than the increased costs of TAV Florence-Bologna, and multiply by 4 planned expenditure, 35 billion becomes a figure of financial fiction.