Germany's Stuttgart regional council has shortlisted four teams for the A6 Wiesloch/Rauenberg-Weinsberg road PPP project.

The teams have to submit their bids on or before 12 November 2015.

The project involves the widening of a 25.5 km section of the A6 motorway between Wiesloch-Rauenberg and Weinsberg (south of Heidelberg, north of Stuttgart) and maintenance of the overall section of 47.1 km. The project also includes a 1.3 km viaduct which crosses the Neckar Valley.

The project will be developed under a 30-year concession on a design, build, finance and operate (DBFO) basis.

The total project investment has not been disclosed. The EIB plans to provide a €235 million (US$266 million) loan for the project.

Germany's Stuttgart regional council launched the contract notice for the project in September last year.

Last month, the German government launched a tender process to select a preferred bidder to expand and maintain part of the A 10/A 24 motorway close to Berlin through a PPP project. The project involves the extension and maintenance of the road and the contract has a value estimated at €400 million (US$451 million).

Autobahn network, the federal controlled-access highway system in Germany, has a total length of about 12,900 km which ranks it among the most dense and longest systems in the world.