ANAS S.p.A. (National Roads Agency)


    Province of Palermo – Italy

The project concerns the upgrading to four-lane of the route Palermo-Agrigento (SS 121 – Catanese) in the stretch from the junction with the A19 PA-CT Motorway (location Ficarazzi) until the junction with SS189 beyond the village of Lercara Friddi.

During  2003-2004 SERING has carried out the Preliminary design in association with ATKINS. The new route involves a 23 m wide and 56 km long mountain road including:

  • twenty-two viaducts for a total length of 15 km (about 27% of the total stretch)
  • thirteen tunnels dual carriageway for a total length of 23 km (about 42% of the total stretch)
  • ten big intersections

Services provided by Sering

  • Preliminary design
  • Environmental Impact Assessment

The assignment involved mainly:

  • Identification and analysis of possible no. 5 alternative alignments – cost/benefit analysis
  • Transport analysis aimed at the evaluation of traffic flows before and after works
  • Extensive field surveys and investigations (soil and materials, topographic, noise and vibration record, etc),
  • Study of car crash of the existing itinerary and projection of the same as a result of the project work
  • Hydrologic, Hydraulic, Geological and Geotechnical studies
  • Road design
  • MEP design

In 2007, the Client requested the review and updating of the preliminary design and the EIA following new project requirements. In this context, Sering developed a new Preliminary project for the solution chosen.