The works consist of the upgrading of the SS640 motorway of Porto Empedocle, stretch Agrigento-Caltanissetta for a total length of 31,2 kilometres.

The project includes the widening of the two-way motorway, with each carriageway comprising two lanes of 3,75 metres, plus paved shoulders of 1,75 metres divided by median strip.

This motorway stretch comprises 7 junctions and 67 minor roads. Key works will include 3 tunnels and 21 viaducts while the minor roads network comprises the construction of 5 new viaducts and the refurbishing of an existing one.

The total length of viaducts will be approximately 6 kilometres.