The “High Speed/Capacity System” involves the development and organisation of the railway network to match growing traffic and mobility requirements.

The project can be defined as a high speed quadrupling of the existing network and railway system. The new section Turin-Milan is 125 km long and includes the following works:

Twin rail line which includes 51 viaducts for a total length of approximately 20 kilometres;
approximately 90 kilometres of embankments; approximately 4 kilometres of trenches; and approximately 5 kilometres of man-made tunnels.
Motorway diversions, adjustments to the existing road system, worksite tracks; over 100 bypasses and overpasses for the railway, roads and motorway interchanges; approximately 40 kilometres of service tracks for civil protection; more than 200,000 m² of anti-noise barriers.
 
The Turin-Novara section was begun for the Turin 2006 Winter Olympics and 85 kilometres were built in only 4 years.
The Novara-Milan section entered into service in December 2009.
These extremely short construction times involved an extraordinary commitment, both from a technical and organisational aspect, and in terms of labour management which involved more than 6000 employees.

The execution of the works involved the resolution of numerous and various interferences:
electricity lines, gas pipelines, oil pipelines, the water and sewage system.