The roadway is characterized by 11 tunnels, with alternating two-way traffic, for a total of 6658 metres in the tunnel and 2088 metres of open sections.
This type of road was classified as ME3; for a one-way street this leads to an internal luminance value to be maintained equal to 1.50 cd / m2.
The efficiency project involves the use of a 13W SIDEis every 7.2 metres on one side of the tunnel to achieve the required parameters.
In tunnels with a length > 1000 metres, a product for the lighting of the vaults is also added, again from 13W, every 14.4 metres, always on the same side of the tunnel.
This results in a total installed of 1199 luminaires, for a total annual consumption of 140,743.4 kWh.