The Variante di Valico, or mountain pass deviation improves life for anyone who has to take the A1 motorway between Bologna and Florence.
and to avoid the congestion that normally builds up between Barberino di Mugello and Ronco Bilaccio. The project was completed after a thirty-year wait for building permission, amidst new legislation and red tape. It is also a ground-breaking achievement not only for CMB, but for Italy as a whole.
The new motorway connection is a technological record for Italy and one of the most important infrastructures built in Europe in the past 20 years. The route winds its way through two Regions (Emilia Romagna and Tuscany) and eight municipalities, covering a total of around 59 km (of which 32 are along the mountain pass deviation). The motorway has three lanes (one emergency lane) in each direction, separated by a crash barrier.
Compared to the height of the old motorway section of 716 metres, the new route has been lowered to 490 metres a.s.l. to accelerate the travelling speed. The excavation of the “Val di Sambro” tunnel involved a huge amount of work: a total of 150 labourers, in addition to the subcontractors, worked in four shifts 24 hours a day. The average boring speed per calendar day was 0.93 metres, excluding any stops to check progress and perform any particular studies on gravitational aspects of the hillside.
12:15 – 23 Dec 2015
The Variante di Valico between Bologna and Florence winds its way through one of the most complex parts of Europe from a morphological and geological viewpoint. This made highly complex technological interventions necessary.
The road is clear on the A1 between Bologna and Florence: drivers now travel 3 km less, with a saving of as many as 15 minutes
In the Val di Sambro tunnel, Italy and CMB celebrate the end of the excavation work on the mountain pass deviation, known as the ‘Variante di Valico’, a construction achievement that has made history and will run along a critical section of the ‘Autostrada del Sole’ (the central A1 motorway) for years to come.
The excavation work proceeds centimetre after centimetre: step by step towards the objective. During the most active periods, there are as many as 500 labourers in the base camp.
In 2005, the CMB group heads the chain of enterprises that wins the contract for the motorway section that runs through the valley ‘Val di Sambro’. In 2006, Autostrade per l’Italia obtains the last building permission to start on the last parts of its intervention. This project was already talked about in the early Eighties, but new laws and legislative complications slowed down the route towards the ‘Variante’.
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