The most significant structural works include two viaducts and two artificial tunnels. The viaducts (Giordano and Granatallo) are characterized respectively by 3 spans of 60 m and 4 spans of 40 m: both decks have a mixed steel-concrete structure composed of two main double-T metal beams of variable height, a central beam only to support the slab and a concrete slab 31 cm thick made with pre-stressed concrete. The Cannatella artificial tunnel, with a polycentric section in cast-in-place reinforced concrete, has an overall length of 95 m and is divided into four sections: the two central sections (L=32.50 m), with a constant section and divided by a water-stop joint, are characterized by a canopy thickness of 90 cm and a bottom slab height of 200 cm, while the two terminal sections (15 m each), have a flute-bill shape with a variable section. The Naviccia artificial tunnel is 42 m long and consists of large-diameter reinforced concrete piles (D=1500 mm, i=1.65 m approx.) with internal reinforced concrete structures; at the top there is a 1.60 m thick cast slab and a connecting beam. The tunnel internal height is 7.88 m.
Another characterizing aspect of the design concerns the landscape and environmental interventions planned to mitigate the structures inclusion: they have been designed and implemented with the objectives of visual levels containment, works integration with the territory, implementation of the naturalness degree (with green systems), mitigation of the works impact and compensation for the undeveloped land loss. Important naturalistic engineering works have been foreseen such as: containment works with reinforced soil, walls covering with local split stone, arrangement with a shrub belt of road relevance, tree rows arrangement, explantation and replanting of valuable trees, environmental restoration of abandoned areas, morphological remodelling (slopes affected by the tunnels construction), acoustic protection interventions (both with barriers and with sound-absorbing paving), insertion of wildlife underpasses and treatment plants of first rainwater.