Projects: Roads & Motorways

Upgrading of the S.S.36 'dello Spluga'


Upgrading of the S.S.36 'dello Spluga'

New route in Valchiavenna

Upgrade of existing route in Valchiavenna and project for an alternative route to the present State Highway 36.

  • Customer:Lombardy Region
  • Location:Valchiavenna
  • Type of service:Preliminary Design; Environmental Impact Assessment
  • Period:1998 - 1999
  • Cost:€ 62.749.000

The proposed design aims at upgrading, in compliance with the prospected scenario, the existing roads in the Val Chiavenna and, in particular, at creating a new alternative road to the current route of the S.S.36.

Therefore, the design guidelines with respect to the reference operational scenario and the identified technical problems were aimed at solving specific problems, which can be summarized as follows:

  • removal of the current crossing of Chiavenna through the creation of an alternative route towards the Splügen pass as well as a feasibility study on possible alternative scenarios towards the Maloia pass;
  • upgrading of the middle-valley stretch through removal of the current crossings of the built-up areas and possible alternative nationalization by way of the on-site upgrading of the S.P.29 and the creation of new stretches on the left orographic side with respect to the Mera river, with removal of the bottleneck of Novate Mezzola in direction S.P.29;
  • improvement of traffic conditions In the low-valley stretch thanks to on-site upgrading and improvement of road safety through widening of the carriageway, extension of the existing and tunnel stretches and solving of critical intersections.

A key element of the entire design structure was the identification of the rules and restraints concerning the specific implementation options associated to the general route definition, based on the identification of the river areas which have actually influenced most decisions related to the designed route, in particular with respect to the identification of crossings and stretches along the banks.

The general design consists of a number of individual functional lots intended to find local solutions to distinct and specific problems.

Along with the study on the possible routes, during the metadesign phase a parallel environmental check was performed in the surrounding territory potentially involved, and the significant results of the landscape-environmental analysis were implemented and transferred into the preliminary design.