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From 4 to 6 lanes in 2039 days
On 3 August 2026, the ceremonial opening of the section of our major A3 motorway project took place. After 2,039 days of construction, the six-lane section of the A3 motorway between the Biebelried and Führt/Erlangen junctions was officially opened to traffic.
Planning
Together with our consortium partner, the 71-kilometre stretch between the Biebelried and Fürth/Erlangen motorway junctions was upgraded. The 5-kilometre section between Fuchsberg and east of the Geiselwind junction had already been upgraded to a conventional six-lane carriageway in 2018.
Eiffage Infra-Bau was responsible for technical management during the construction of the A3. This means that Eiffage Infra-Bau represents the construction consortium vis-à-vis the client – in consultation with the consortium partner, which acts as commercial manager. Eiffage Infra-Bau is also responsible, amongst other things, for supervising the construction work, obtaining planning permission and concluding subcontractor agreements.
The start
Work began in May 2020. The construction site, including all the necessary infrastructure (three site offices, IT, accommodation, etc.), was set up, and over 200 trade workers, 150 office staff and more than 100 external staff were employed by the construction consortium.
Progress
Public transport was diverted past the construction site using a so-called ‘4+0’ traffic management scheme (redirecting traffic from two lanes to a single lane in each direction within the construction zone). Outside the existing motorway structure, earthworks were carried out for the final six-lane expansion.
A total of 91 engineering structures were erected:
- 4 large bridges
- 22 single-span overpasses in composite steel-concrete construction
- 67 underpasses, noise barriers and retaining wall structures
In the road and civil engineering sector, around 2.1 million tonnes of asphalt were moved, at a rate of up to 9,000 tonnes per day. The Eiffage Infra-Bau team was responsible here for installing all road infrastructure, including road markings and signage. The project also included the installation of drainage systems, natural and landscaping works, and operational facilities.
Completion
On 3 August 2026, the route was officially opened. The contract also includes the operation and maintenance of the entire 76-kilometre route for a total of 30 years, until 2050. This means that the consortium will be responsible for winter maintenance, grounds maintenance, repairs to the route and the rectification of accident damage, ensuring that the route can be used safely and comfortably by all road users.
With this project, we have made a significant contribution to the efficiency and sustainability of Germany’s transport infrastructure. Many thanks to everyone involved for their commitment and successful collaboration!
